Hello, I want a 20 year old windshield, which is scratched and slightly milky again.. Could this possibly work with Autosol Metal Polish? Yes, I know that this polishing agent is intended for metal and that the disc is made of Plexiglas. So please no unnecessary answers. Maybe someone has tried it already. Autosol is just the only polish I have there. Do not want to spend a lot of money on polishing agents, because a new disc “only” 35€ Kos I would also like to hear more good tips.