I got the herculiner inside, preped, and even took a wheel to the metal to ruff it up. Looks great and love it compared to that nasty vinal crap!! As far as the outside, I just saw a guy out in west Texas that put it on the outside bottom half, looked pretty damn cool actually! Said didn't have to worry about rust and fixed a few dents before hand so could cover that up too. I think he used duplicolor though, not Herc, because it looked alot smoother than Herc, but might of just been a different was to apply. . .either way, it's great stuff, why not just dip your 4Runner in it completly!! <img border="0" title="" alt="[Wink]" src="images/icons/wink.gif" />