Truckers, dump truck style trucks, hauling the stuff. Ashalt is hauled in the back of dump body trucks and THEY USE diesel fuel in a spray bottle to wet their beds, before the ashalt goes in their. Its much easier to clean the black goo off, afterwards. It works. Baked on exhaust pipe goo may need some soaking, so leave it on for a while and go back to it, for an easy wipe off. Kerosene, WD40 and Bug/tar removers are all good ideas. Randy![]()