I1985 wrote:...At least some of them (atleast Red-Kote that I know off) claim ethanol and methanol resistance and therefore should hold up well. So basically your original fuel tank will provide the shape and rigidity, but the fuel will be held by the coating on the inside. Might be an easy and cost effective way of making your aluminium fuel tank better resistant to Ethanol.
It would work great on a plain tank. Unfortunately, a proper fuel tank in a hardcore sports car has baffles and one-way doors, so the stuff can't be applied there.