Still have the face to that tach? Does AutoMeter make the same model? If the answer is yes to both, it can be salvaged. The decal paper is the easiest (not the best) way to do it. From your layout, it appears the white paper would work better. Even if you don't like the font, or can't match it, you can layout all gauge faces on one or two 8 1/2" X 11" decal paper sheets. The hardest part is cutting out the decals. Any rough or mistakes in your cutting will be noticed. Beyond that, it's just like putting decals on a 1/24 scale Sox & Martin 'Cuda! Layout, print, clear, cut or install on gauge face, then cut, & install! Silk screening is similar, except there's no print button! A simple sheet of white vinyl can be screened with black vinyl ink. Then it's the same. Print, cut, & install. On your yellow to red redline, each color needs to be screened separately. That can be done with hand cut film. The remainder is done like developing film. Take to the screener in your town & have him shoot the film for you. You adhere it to the silk screen, which you can buy, or fab yourself. Doing it yourself will allow you to make the screens the size you want. This is something that's best done by finding a few friends that want the same thing done. That way you spread your costs out. Just black or white vinyl ink isn't that bad. But when you want colors, the costs add up fast, & you really won't use much ink on faces. Like T shirts? lol let me know.