mine are enkei racing, also 3 piece and im ring up about them today, i live in mandurah so i gotta drop them off sometime i ripped the front bar off last night and apparently it can get a re-resin of the back and fully re-fibreglassed and a re-spray for about $400. (my last quote as $330 but now its a bit more dented.)
i'll let you know what they say...