smoke stain?
 

what is the best way to clean the black off of your paint from the exhaust? Something that wont hurt the paint?

I just wash as usual, and it comes right off.

i have to use simple green to clean the side of my truck

If the area is waxed, the soot should wash off. If not waxed, the degreaser(s) should remove the soot and then you should wash the area & wax it.

Even my wheels are not hard to clean since I've been keeping them waxed. :U:

x2

i use simple green also. I just often think to myself, that it cant be good for the paint

havent had a problem and i use it to get the rubber off the front fenders and doors from back to back pulling on black top and ive had the truck painted and no problem with orange peel or fish eyes thats why i like chrome plated aluminum wheels wipe right up