Sorry to hi-jack this thread, still keeping this on topic but didn't think it was worth starting a new thread when this one is only just over a day old.
I'm having the same problem with lacquer peel on wheel caps, guessing that it would need sanding, then priming then painting and lacquering again?
Possibly less hassle to buy a decent set of 2nd hand caps, going on the bay from Clio Spares for £10 a pop.