Faskolor!!
Faskolor is fuel proof to a point, especially so after a week. I wash out my bodies with a quick stream of hot water then shake-em dry and let them sit-UNTOUCHED. I dont wipe them out when wet!!! I have noticed traction compound, rubber, oil, etc. come out with plain old hot water very well. I just wipe out the windows so they dont have spots on them.
So more in detail, I let tap water get hot first, hold body by rear and wash out body from back (wing area) to front. This way I can get all that rubber out of the rear wing area like on my 12th scale and 1/8th On-road bodies. Teh shake excess water out and let air dry.
And yes, FASKOTE is a great way to coat underside of bodies.One more tip-If you are painting a body to be used tomorrow-better put a coat of Faskote on it and dry it very well from coat to coat with a hairdryer. If you arent using the body for a few weeks, skip the cover coat and save weight, save smell, save material!!!!
Ray