Hello Keith
you are right thinking they could be resistant ( years ago they could be) but unfortunatly modern fuel and specially 95 is now very very agressive to most inks, vynil, and rubbers !!
( This is effective as soon as they added 7 or 8 years ago aggressive additve on to help modern "ecu" roadcars to have good firing set up and minimal polution)
Result is ; agressive comportment to many materials primarly resistant to normal fuel !! like your stickers !!! but also more dangerous ;
some Rotax engines on ultralight planes had plastic floats on carbs that melted few by few and damaging very dangerously internal connections and making the engine to stop during fly session !!
On racing cars we had also similar problems with internal Aeroquip rubber hoses melting and no way to understand what was happening due to the stainless external protection to be ok !!!
And one other dangerous case ; on starting Le mans qualification in 2007 and doing the first refuelling on our LMP1 (car was arriving to the pits !!) as soon as fuel was coming into our usual vynil hoses it melted in less than 10 secondes and we had 80 litres of on the pit floor !! car arriving on and running on top !! Fortunatly on radio diver was ordered to go to the next pit !! and this happened to others some minutes after ; reason was ACO organiser ordered for the race to fuel supplier to supply " as much as possible a type fuellmatching to road car "standard fuel " homologation !!!!
That's what they call "modern global way to live "!!
Did this damage on decals damaged the painting ????