WC ja I know there is interest in this, it's been discussed before. I tried (1) Rustoleum Plastic Paint : Fail (2) Rustoleum Plastic Primer + Aerolac Satin Black : Fail after about 1 year , and now (3) This one, ie, Rustoleum Plastic Primer , cured for 2 weeks first, then Velvaglo on top, also cured for two weeks with no gas in tank.
This latest version the Jury is still out on. Too early to celebrate. However, the theory goes this time that I EXPECT the primer to soften in the fuel vapours that transit through the polyethylene ! But letting it really, really, really DRY first, removes all traces of retained solvent that might have been responsible for blistering in the past. (Clue: It failed mainly where the sun cooked it )
My Velvaglo test plate showed very robust petrol-run resistance , so now I hope that although the fuel might soften the primer, it basically plasticizers the polymers and keeps the Velvaglo in adhesion.
It's too early to publish, I'll invite a ton of shit on my head if I do ! But so far so good , I remain cautiously optimistic. An Acerbis tank for the old DR would look really cool pimped out painted, if we can find a system that works, and works well !
Velvaglo is PU , self-crosslinking , it should hold against hydrocarbons for a while, and I don't mind refreshing the job if I have to.
Just not too often !