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Body Work - Paint Removal & Prep w/ Primer #709325 03/23/06 05:37 PM
Joined: Aug 2005
Posts: 301
LUV24BY Offline OP
Mudrunner
Ok, so I began a little test yesterday of taking down the paint on my Runner. It is the original coat from the factory and seems to be coming off ok! I tried 80 Grit with a 8 hole orbital sander. I have a couple questions for you folks:

1. What is the correct Grit to take down the paint?
2. Should I take it down to the factory primer or all the way down to the metal?
3. Would a simpler way (a friends suggestion) be to use a spray on paint stripper?
4. What is the best primer to use?
5. What needs to be done to prep the cap and to paint that?

I am going to be taking it to be paint way down the road however I want to get the ball rolling for the prep. I will be doing a Bright Sun Beam Yellow with Flat Black accents.

Any expereince y'all have would be appreciated! <img src="/forums/images/graemlins/kewl.gif" alt="" />


John


This is my first time here, be gentle......
.....But play DIRTY!
1985 Toyota 4Runner
http://www.cardomain.com/ride/2066809 Check this if you want to see her!
Re: Body Work - Paint Removal & Prep w/ Primer [Re: LUV24BY] #709326 03/23/06 06:06 PM
Anonymous
Unregistered
chemical strippers are nasty, and they don't save you a lot of time on big surfaces. if you have a part that has 5 coats of apint on it, resort to the chemical stripper, else, stick with the 80 grit for large-scale bulk paint removal. DO NOT USE chemcial strippers on the top, it will melt the plastic it's made of.

after you get the big paint off, move to 120 grit, then to 220 grit. after 220 grit, coat the whole truck with a self-etching primer. then WET sand the whole thing with 400 grit. the water will keep the paper from clogging, and will show any high spots in the paint. after you get it where your'e happy with it, give it another shot of self-etch primer in a different color. go over it again with 400 grit paper, use a good long sanding board so that you can see the high and low spots when you go through them. you'll have to lather/rinse/repeat a few times to get the truck where you want it before you finally paint.

painting a truck takes about 40 hours of good hard back-breaking labor. actually putting the paint on the truck takes about 2 hours. it's kind of like having a wood floor installed. coating the floor with polyeurethane only takes afew hours, but it took a real long time to get the wood underneath it.

Re: Body Work - Paint Removal & Prep w/ Primer [Re: LUV24BY] #709327 03/23/06 06:43 PM
Joined: May 2002
Posts: 186
J
jmsdad Offline
Wheeler
Here is the result of $50 in paint materials and a weekend of work. I took the paint down to the primer with a scotch pad, then shot it with primer and then 2 coats of Acrylic enamel. I did this 2yrs ago in the garage with a cheap gun and small air compressor.

[Linked Image]

I've had compliments on it when people see it from afar. But as soon as they get closer, the overspray sort of stands out. This was my first time using acrylic enamel paint--the overspray sucks! But it's cooler now than when it was black. <img src="/forums/images/graemlins/smile.gif" alt="" />

Here you can sort of see the overspray (light/dark areas). The cool thing is I can use silver Rustoleum Hammerite paint to touch up. Perfect match! My sliders are painted with hammerite paint.

[Linked Image]

Re: Body Work - Paint Removal & Prep w/ Primer [Re: jmsdad] #709328 03/23/06 09:43 PM
Joined: Aug 2003
Posts: 480
MAC Offline
Mudrunner
what color/brand paint did you use? any clear on top? I like that silver.

Re: Body Work - Paint Removal & Prep w/ Primer #709329 03/23/06 09:54 PM
Joined: Aug 2005
Posts: 301
LUV24BY Offline OP
Mudrunner
So, if I am understanding correctly, you use the 80 to get the clear and paint off (down to factory primer) then move to 120 for the primer down to the metal?

I am a complete <img src="/forums/images/graemlins/butwiggle.gif" alt="" /> when it comes to bodywork, however I want to learn. I did (in only a couple places) use the 80 to go down to the bare metal. Is this not good?

Also, regarding the orbitable sander - do you use it just flat, angled toward the edge of the wheel/disk or what? When doing the sanding do you just go back and forth with the sander or a circular motion? I don't want to create more problems by my technique.

I am not looking to put a $3000 high end paint job on this, it will be a trail rig - I am not expecting perfection and a mirror show car finish - However I do want it to look nice from a far and up close! I'll leave the marks to the trail carnage! <img src="/forums/images/graemlins/notooth.gif" alt="" />

Thanks!

John


This is my first time here, be gentle......
.....But play DIRTY!
1985 Toyota 4Runner
http://www.cardomain.com/ride/2066809 Check this if you want to see her!
Re: Body Work - Paint Removal & Prep w/ Primer [Re: jmsdad] #709330 03/23/06 10:01 PM
Joined: Aug 2005
Posts: 301
LUV24BY Offline OP
Mudrunner
That looks sweet! Like the work and F those who think it's crap!! <img src="/forums/images/graemlins/kewl.gif" alt="" />


This is my first time here, be gentle......
.....But play DIRTY!
1985 Toyota 4Runner
http://www.cardomain.com/ride/2066809 Check this if you want to see her!
Re: Body Work - Paint Removal & Prep w/ Primer [Re: LUV24BY] #709331 03/23/06 10:09 PM
Anonymous
Unregistered
you don't need to go down to the bare metal, just to an even base that you can build up from. if you see different colors get a 1" feather between them.

just as a side note. I've painted 4 cars and had two painted by others. if you're just going for a shiny trail rig, the BEST looking trail truck I ever did was a 78 cherokee chief that I painted with Rustoleum Painter's Touch Sage Green spray cans. I spent $42 for a case of the paint, with coupon, at Homey D and used them all after prepping the truck as above. keep it even, keep it flat, and when you're done hand polish the hell out of it with 3M paint polish, then follow it up with the 3M liquid wax with the UV protectant. I swear by all that's holy that you could brush your teeth in the hood of that truck, and rock rash was fixed with the extra can I kept under the seat.

if you want to use an acrylic enamel or the like, rent or buy a good gun. the gun is more imprtant than talent, imo.

Re: Body Work - Paint Removal & Prep w/ Primer [Re: MAC] #709332 03/23/06 10:19 PM
Joined: May 2002
Posts: 186
J
jmsdad Offline
Wheeler
Quote
what color/brand paint did you use? any clear on top? I like that silver.


I used Acrylic enamel lacquer . I did not use any clear coat and don't see the need for it. It's not a show truck, but a hunting/camping/exploration rig. <img src="/forums/images/graemlins/smile.gif" alt="" />


Can't believe price has gone way up! When I bought it couple years ago, it was $30 shipped.

Quote
That looks sweet! Like the work and F those who think it's crap!! <img src="/forums/images/graemlins/kewl.gif" alt="" />


Thanks John....Here's a little reading for you. I saved this to my computer years ago....

Here are some tips I found:

You have quite a bit of work ahead of you but you can actually get a really nice job done if you are careful. I did a bit of time as a sander/prep/primer in a body shop but it was a while ago. I will try and give you a run down. OK, here goes:

Sanding:

You can sand by hand if you want, or go rent/borrow an orbital sander. It will make your life sooo much easier. You will need to use several grades of sand paper as you go through the job.

Start with about a 200 grit paper either by hand or on the orbital. Using an orbital, apply light but firm pressure and sand in a circular motion. Use the edges for edging...the center for nice big flat surfaces. If you use hard pressure on the edge you will put lines and divots in your surface that will show up later.

You do not need to go down to bare metal anywhere UNLESS you hit rust. Anywhere there is rust, you must go down to bare metal and keep grinding away until you have exposed all the rust. To give you an idea, a rust 'spot' or bubble the size of a dime will probably grind out to an inch to two inches across. If you don't get all this ground out then you have wasted all your time because it will come back really fast. Once you have ground out the rust, apply a good rust treatment such as Rust-Mort. Let this dry for 24 HOURS, if not you will be sorry! Also, don't let it dribble onto the rest of your paint.

For all the non-rusty areas, you need to go down through the paint past the 'orange peel' stage (you will know what I mean when you start sanding because the shiny finish will start to look all dimpled like the surface of an orange, and then will finally sand out to a chalky uniform surface.) The orange peel look is what happens when you sand off the tops of all the ridges and valleys of your paint. When you put on a clear coat, it fills all of these and you don't notice, but when you start sanding you will really see how many small imperfections there are.

Anyway, you have to cover every inch of your truck that you want to paint. No shiny patches can be present at all or the new primer and paint won't stick and it will start flaking.

Once you have made it down to the nice soft, chalky stage you are ready to fill any small dents or imperfections that you come across. If you need help with that, let me know and I will describe.

Otherwise, you are ready to prepare for priming.

See next post for the next stage.

Prepping and priming:

To find good supplies, look in your yellow pages for auto-body supply store. They should have everything in good quantity and quality. Right now, you need to buy:

2 or 3 tack cloths - a sticky kind of J-cloth used for wiping up dust.

A primer. you can either mix yourself or buy pre-mixed which is easier. Take some rough! Measurements of your truck to get an idea of the surface area you have to cover and then buy double that amount because you will want to do two coats of primer, or at least one good coat and then a film coat after you sand the first one. A couple of brands you might find that are good are: R-M and Mar-Hyde. Decent primers/reducers/thinners/ etc... Ask your paint supplier for advice on mixing and using a graded mixing stick if you are going to mix your primer, and also for your paint.

Automotive masking paper!!! A must. It is pretty cheap and sooo much easier than trying to use newspaper. A 24" wide roll should be wide enough.

Masking tape - the green kind used for paint masking.

Plastic Poly, 2-4mm to make an enclosure in your garage.


Now back at your garage:

First, vacuum your entire work area, everywhere!!!! The truck, your floor, your bench, your clothes. Dust is now your enemy and will be until your paint dries. The cleaner you are now the better you paint job will look. Then, wipe down your entire truck with a damp cloth. Rinse it frequently and try to hit every nook and cranny with it. Let your truck dry for an hour.

Next, take one of your tack cloths and feel up your truck. Keep turning the cloth over and over, and using all of it's surfaces. You will be surprised at the amount of dust that comes off even though you just washed the truck down.

Once you are sure you have gotten most of the dust you can begin to mask the truck. The easiest way is to put a strip of tape around everything you will need to mask. So, put a strip around your windows, make sure to cover very! Carefully cover all the rubber and weather-stripping. Also around your bumpers, your grille, any trim etc.... This strip will be the exact line that will show when you peel it off after painting so make sure it is really well done.

Now you can begin to apply the paper. Tape the paper to the strip of masking you have just done around all of the places you are going to mask. You don't have to worry about being neat with this one because the first strip is your finished line, just make sure you don't leave ANY openings. Paint gets in even the smallest crack and cleaning overspray sucks!

Once you have masked everything, you need to put up a temporary enclosure around your vehicle. This prevents paint from getting out, and dust from getting in. If you don't, your entire garage will be coated in a nice film of primer and paint, it is atomized so small when you spray it that it just gets everywhere. Make sure you hang it from floor to ceiling and leave enough room to move without touching the plastic.

Now, finally, you are ready to prime. Make sure you are within the temperature range for the primer that is written on the can or it won't spray or dry properly. Practice on a cardboard or wall first and try to get a feel for how close to hold the gun and how fast to move it side to side. You want a nice even and fairly thick coat, but if you go too close or too slow the primer will RUN. NOW is the time to practice this because you can always sand out any RUNS you get in the primer. You donÆt have a second chance with the paint!

Don't worry if you spray it a little thin, you can always sand and re-coat it. Up to 3 coats of primer is just fine and makes a nice smooth base for your paint to adhere to.

Once the truck is all primed and dried, you need to sand it again. By hand only this time. Use a 400 grit paper and gently but firmly sand the entire truck by hand. you will find that the primer quickly sands down to a smooth finish, you don't need to go any deeper than this. It will feel gritty one second and then smooth the next, you will see what I mean.

NOW, repeat the whole vacuuming, damp cloth and tack cloth all over again.

Now prime again and sand again.

After the second coat of primer you are ready for the paint.

See next post. Getting tired yet?

Now for the painting:

My suggestion for paint is to go with an enamel because it does not need to be heat baked to get hard. There might be a good base coat/clear coat combination out there now that doesn't need to be baked but ask your supplier for advice. The easiest by far is an enamel paint.

This will require 3 coats minimum! They will all be about the same thickness. The idea is to build up to a nice even and shiny finish. You don't want to have it perfect on the first coat, if you try you will get RUNS which look crappy and you will not be happy! Choose your color and get the appropriate amount of Thinner and Reducer and Hardener (again, R-M or Mar-Hyde are pretty good brands) to mix with your enamel paint. You can get a graduated mixing stick that makes this super easy. You just pour in the amount of paint you want, then fill with thinner and reducer up to the lines matching the amount of paint you just put in.

Once you are back home with all your supplies, set up a clean mixing area inside your enclosure, but far from your truck so you don't bump it when you are spraying.

Once more, go through the entire vacuum/wiping/tack cloth process. This is the most important step. If you don't, any little pocket of dust in a nook or cranny on your truck will produce a little dust explosion that will look all dull and spotty compared to the rest of your nice shiny finish. I know this sounds like a whole lot of work but it is worth it I promise.

Once you are convinced that your truck/enclosure/tools/and clothes are pretty much dust free then you can mix your paint. Mix up enough to cover your whole truck once, plus about 1/4 more because you will waste some trying to be careful on the first coat. Make sure temperature is good, your gun is set to the right pressure (only a few psi, I think most guns shoot paint from around 4-8psi).

On the fist coat, you want to cover the entire surface lightly, but the primer will still show through somewhat. This will not look nice or shiny, in fact it will be kind of dull but it will mostly cover the truck. The key here is to get an even coat with NO RUNS. I know I keep stressing this but they look like crap and it is sooo hard to sand them out. You have to use a 2000 grit or higher wet sanding block and be really, really, patient.

Allow this coat to dry as specified on the can.

The next coat is applied directly over the first, no sanding. It will completely cover up the primer and you will start to get a nice deep color and a bit of a shine. Don't go crazy heavy here though, the more coats the easier it runs. You have to build it up nice. Let this dry again for the time specified on the can.

Third coat. Here's where you get your shine! This will go on looking really wet and you will have a practiced hand by now. You just cover the whole truck with a nice shiny wet coat and then let her dry. An enamel paint will naturally show up super shiny after it is dried and hardened. It will take at least a full day to cure so don't take down your plastic or touch it or anything. Even after a few days, this paint will take a finger print if you leave it out in the sun for a long time. It will take a good week to harden right up. Just the nature of the paint of you can't bake it.

Above all...Don't Touch Your Truck after you have put on the first coat of paint!!! It will totally show up even the slightest brush or print.

Hope this all helps, have fun. It is a lot of work but when you get done and it looks so nice you will be really proud of the job.

Last edited by jmsdad; 03/23/06 10:22 PM.
Re: Body Work - Paint Removal & Prep w/ Primer [Re: jmsdad] #709333 03/23/06 10:25 PM
Joined: Aug 2005
Posts: 301
LUV24BY Offline OP
Mudrunner
Man - y'all ROCK <img src="/forums/images/graemlins/smile.gif" alt="" />!! Thanks for so much info and support!

<img src="/forums/images/graemlins/smile.gif" alt="" />


This is my first time here, be gentle......
.....But play DIRTY!
1985 Toyota 4Runner
http://www.cardomain.com/ride/2066809 Check this if you want to see her!
Re: Body Work - Paint Removal & Prep w/ Primer [Re: LUV24BY] #709334 03/23/06 11:48 PM
Joined: Apr 2005
Posts: 525
yodta Offline
Rock Warrior
that's a fantastic writeup!

I'm in this boat myself. need to paint two vehicles, and I don't know much about painting, but I know what I don't like.

I love a good job, but holy crap, this looks like it might be a bit too much for me to take on. I'm such a perfectionist... I'm already feeling anxious about not having the right materials, or not getting it masked properly, or leaving a speck of dust, or the temperature being off!!!

I need therapy.

Last edited by yodta; 03/23/06 11:50 PM.

msg - '87 xtracab
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