Don't know whether to post this in Radicons or here, so I'll post here and the mods can move it at leisure I suppose. Two questions: 1: If a toy is already yellowed, can the process be reversed i.e. cleaning, bleaching etc. Anything other than repainting the damn thing. 2: How do you prevent this in the future, is there a special lighting or whatever? Help, as usual is much appreciated!