If you wnat to strip down the entire chassis bring it to a sandblaster. The only drawback is that in certain areas (channel areas) they won't be able to remove the old epoxy....but then again it's better to leave it anyway since you won't be ablke to get to it as good when you fo to paint/powder coat it. JC Whitney sells some special sprayers and Rust Stopping formula just for getting into tight spots like the channel areas. The sprayer has different nozels to choose from. If you just want to repair the dmaged area simply scrape off all the loose epoxy of the chassis. Scrape around it until you get to good epoxy (wasn't damaged and still bonding to the steel). If you need to remove any remaining epoxy that just won't come off then go to home depot and get yourself a can of Kleen Strip, this stuff will attack the epoxy and loosen it right up. Once your down to bare steel, use POR-15 to paint it. This stuff is equivelent to Powder coating. It is not impervious to brake fluid....nothing is unless you galvanize. Before painting on the POR- 15 they maje a special metal "prep" formula. It's called "Metal Ready". This will neutrilize any rust that's present and also etch any smooth surface metal (POR-15 needs a toothy surface to bond too). Steve