I have Some rusty holes to sort on my bus from a previous botched spoiler someone fitted, I'm looking for some advice for me doing it my self to tidy it up. I will then will get it professionally painted at a later date. Offending pics.
you could grind the heads of the screws off and the treat and fill... that way your headlinner is'nt going to catch fire... if your grinding cover all glass up...
If water has got into that seam that runs down the sides of the windscreen, it'll be rusting from the inside out. Ask me how I know.....