Im not sure about leaf adhering to plastic? It's usually used on metal (which is a pretty non-porous surface). I think your going way beyond what it needs to be fixed. Plus if that's burnt, you may need to fill it in (logo is raised). Like smokey said, some silver testors, or if you want to make sure you get the shinyness, use something by rustoleum, like this:
http://rustoleum.com/CBGProduct.asp?pid=114