Yeah, no rattle cans. (though have found the matt black by Wurth to resist petrol very well)
All done using proffesional 2k paint system. (ie vehicle spray paint)
It is the finish coat that is crucial to resist the fuel, so technically you could pretty much use anything for the base colour if you want to do most of the job yourself and then get the top coat shot over in 2k clear by somebody in a bodyshop if they were preppared to do so.