I've found that whenever I've applied the 'STATIC CLING' TYPE of car window sunshield to my vehicles, that i end up saving the scraps for all kinds of uses. I've applied it to mirrors for 'scratch-proofing' and it generally holds up well, up to a year, more if in a sandwich bag, Gene

Where do you buy your 'static cling'? computer stores?

Nope, I get my 'static cling' from auto parts stores. It's sold in the USA for keeping out the sun rays in the Southern climes. Also, home repair stores carry it for home window treatment use. it's sold in rolls of varying widths, lengths, and colors/densities. Gene

I use the 3M clear "Stoneguard" for just about any protective / repair / coating . I even put it over my watch bezel . Won't yellow = UV proof