P21s wheel cleaner should not effect the crests ( I have used it for 2+ years on present car and several years on another car).
Plexus should also have no effect since I have sprayed it on the paint of my car (by overspray) and it seems to wipe off fine.
I wonder if the paint on the crests is defective? I do not believe it is an epoxy based, but it may be.
Can you sacrifice one of the crest? If so, send it to me and I will get some chemical analysis on it to determine the paint type and compatability with cleaners/solvents (Plexus and wheel cleaner). If interested, send me a email with some specifics.
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