I'm using Por 15 now on my 41 1.5 ton chassis, I've also used it on the fuel tank, inside of riser etc. The best part is I painted my leaf springs with it, Por 15 is so flexable, it holds up to flexing springs. I called the mfg. about it and they say it is good up to 450 degrees. I had a bit of a paint spill (in the driveway) that I tried to cleanup before my wife saw it. I got por15 all over my hands, its been 10 days and its still there. WEAR GLOVES!!!
