[WildBillyT]

Originally Posted by IROCZman15

yup, I started with various spray on degreasers and some aggressive brushes. Then realized that most of the stuff was adhered beyond what chemicals were capable of. (also, the drips of the chemicals got annoying since i was working on the floor with the car on jackstands..and it kept dripping all over me). After about an hour of that I switched to a whole assortment of wire wheels, scuff pads, and wire brushes powered by a hand drill. This did a great job of just buzzing away the factory undercoating, gunk, grime, sediment, etc. it took a LONG time. like days! but it worked great. it still holds up without any imprefections in the coating to this day. The color got slightly slightly faded, but thats fine with me. Its clean, easy to wipe down, and a solid barrier against rust and everything else.

A heat gun and a putty knife will do a good job too.