I've had great success cleaning Mego Trek outfits by spraying them with oxy-clean and soaking them in water for a little while. I've never had to clean the nylon material (such as capes or Robin's shirt) until now. What is the best way to clean the cape like material? Will the colors of the cape bleed onto the other fabrics they're sewn to? And can you soak outfits with sewn in belts, like Superman's? I'd appreciate any advice anyone has to offer.