>>10005942>All these people saying retrobrite or peroxide will fix it haven't researched it thoroughly enough.They need too because that stuff will likley make the plastic brittle overtime with just one application. The choices are discolored plastic of making your toy look good but turn to GPS like dust in a handful of years. Pic related is a bio plastic that was treated with those chemicals. The reason it whitens/cleans is because it's actually dissolving a layer of plastic.