Yeah, I saw on some anime garage kit plac eonline that oils on resin is not good... Course, this may be the other type of resin I\'m thinking of (vinyl, realy).. Those types of kits are usually hollow cast, so there is sprue to some stuff you could try.. heck, I may just test it on a peice right now! Anyhoo, resin, plastic or vinyl, don\'t go near it with paint thinner!
Edit: D\'oh! Threw away the last of my scrap peices when I cleaned my desk! Oh, wel...