right I found a ski slope on line at a good price in two version chrome or powder coat gloss black, first thought was how does powder coat stand up to our fuel, time for a test so got some fuel and painted it on the frame behind the tank where it's not seen, it dulled the powder coat a bit but left for a quarter of an hour nothing more and it polished up as if nothing had been on it.
While I had a pot of fuel and a small paint brush might as well test a bit more first the ski slope, painted it liberally in two places expecting to see it swell and crinkle like the bit already there, no nothing happened even after being left some considerable time, then I tried painting fuel onto a spare oil tank that I had intended to trail different black painted and lacquer, painted the fuel on liberally over the tank ( tank coated with ordinary cellulose lacquer) and left it some time, nothing happened.
Next thought was a fir fetched thought I had a while ago that perhaps the rust treatment I used on the tank reacted with the fuel, so repeated the tests above with fuel from the tank - nothing.
Very strange, only other thing I can think of would be acid from the battery, but it hasn't been disturbed from where it sits, so I'm repainting the ski slope, will give it plenty of time to cure and test it with some fuel, if fine then fine else it's order the one on line.
That is unless one of you is a pal of Prof Brian Cox and can have a word in his ear about these quark thingy's