We've all heard various miracle methods for cleaning faded, yellowed plastics to make them look like new again... but does anybody know how to intentionally fade or yellow plastic? This isn't a Transformers custom, but I figure this is as good a place to check as any. I'm trying to take the Doctor Who Sonic Screwdriver you and make the casing look more yellowed, like the actual prop. Pictures are enclosed: This is the original toy, as it exists right now. And this is the current version of the prop, as far as I know. Rather, this is an image of the upcoming prop replica. This is how I'd like mine to look. I think the taupe casing contrasts nicely with the metal fittings. A friend of mine mentioned how she once tinted a set of bones by brewing black tea and giving them a soak, but I doubt that would work on plastic. Any thoughts?