Ive got a patch on the bonnet of mine that had a been subject to a massive dump from gods knows what ( except it must have had a prawn vindaloo the night before !! ) Had only been on there for the day, certainly was not there in the morning, but in that relatively short space of time it'd etched into the laquer of the paint, almost like a slight crazing pattern.
If anyone has any paint correction ideas I could follow to try improving the problem ?