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Got camera , here's the pics hopefully they turned out [Linked Image] [Linked Image] [Linked Image]
You can see what I was talking about the rust marks after honing ,I still haven't done the acid trick yet.
The one with the red straw shows you where the carbon was plugging the oil passage to the pin.
This is still the same piston for the # 1 cylinder notice the scoring that I was taking about,what do you think? <img src="/forums/images/graemlins/scared.gif" alt="" />


Just to add my opinion acid will remove the rust but if you have pits they will retain oil and can affect ring sealing. Pits on crankshafts are ok, but not in cylinders.
Also have a shop mic that piston.. scoring like that says heat!! I suspect that it may have a collapsed skirt.

Pistons aren't really that much in $$$

Randy- ( Dad on SQC)

http://www.enginemachineservice.com