I've got a story also. Years ago I owned an '84 Guards Red Porsche 944. Some one threw an egg at it while I was driving and damaged the paint on the hood in an area of about the size of a fifty-cent piece or so. I couldn't live with that and had the hood repainted by a shop that assured me the paint would match. Well it didn't and I ended up trading a fifty-cent piece sized area for a whole hood that didn't match well. Probably took $500-$1000 off it's value when I sold it.
This episode taught me it's better to leave small cosmetic issues alone as you're almost certainly going to be struck by the law of "unintended consequences" when trying to remedy the issue.