Two things...

First, if you haven't already done it, you must "Fuel-Proof" the engine compartment. A good way to do this is to use 30 min epoxy thinned slightly with alcohol. After that cures, you may paint the area with any FUEL-PROOF paint available at your LHS. Most regular paints will deteriorate when exposed to glow fuels, so a good fuel-proof paint is required.