I’ve used the rear windscreen renovate stuff a couple of times to clean up the rear screen – it works well but the white residue clings to the hood edges. It makes the windscreen / hood edge look worn.

I found the easiest way to restore the original colour was with the use of a black permanent marker pen. I also used a piece of plastic – cut from the top of a discarded marj tub – to make sure that non of the ink touched the windscreen.
