[ChrisHamilton]

Originally Posted by 962porsche

Evapor-rust is a fantastic product I have used it countless times restoring motorcycles with fuel tanks that are rusted inside. but in no way would I even think about using it for what this topic is about.
personally I don't like rust treatment , rust converters and such !
I'm a firm believer in a situation like this with rust in the corners of the windshield fillers to spot mid blast the rust down to clean metal. then epoxy prime it if you have a few pits you wanted to fill skim it with a quality body filler spray a little build primer on it and your done.
little hand held spot blasters are very low cost and so is blasting media.

Yep. Totally agree. Really the only effective way to do it.