Spifire,

I know some feel that Rustoleum is not 100% fuel proof, but I have never had a problem up to 15% nitro. I've never tried fuel higher than that. I've never clear coated Rusoleum. Here's the deal... Rustoleum uses "fish oil" (so I'm told) and does not seem to attack other types of paint. I've used it over eveything but laquer based paint and have had good success. The secret is to let it dry AT LEAST a week before you touch it. Don't allow fuel on it for a week minimum! That's why a lot of people won't use it. No patience.

Paul

P.S. Spray it on thin. If you build it up too much, the first coats will never dry to fuel proof quality. Rustoleum does not breath like enamels or laquers.