I have tried and failed to paint properly. Using a heat fan seems to help a lot to diffuse the paint evenly as it dries. However it does look dull on the promo material, not mirror. The alternative is the Krylon Looking Glass spray which seems to give a cracked look according to youtube reviews, but I suspect it’s also dependent on temperature/conditions during application. It looks like Rust-Oleum Mirror effect is the better one to get a true mirror effect ($9 at home depot for the right one vs $12 for the left one at amazon). Once that’s even (look through) you paint over with a dark paint to finish the mirror. Ideally, you spray it 5 times with very light coats at a foot away. You can use that spray to paint the back of a piece of plexiglass, and turn it into a mirror. Superglue is meh: you can pull metal+acrylic bonds appart.The photo below is the end result of that project exposed at a convention center, with the acrylic case and acrylic insides, done as one way mirrors. polish: I tried headlight polish and it did not really accomplish anything much.This is used for mirroring, in particular if you do gilding. The goal is to change the surface tension of acrylic so it bonds better. You run the flame over the surface without melting it. There is some heat treatment that uses a blue flame to de-oxydize the air, but not melt the surface.It’s best used for edges to make them transparent. My experiments with MAP gas did also create tiny bubbles and warping. You can flame treat to remove scratches but it’s hard to do and doesn’t work that well.If it was heat treated it will react violently and crack. Avoid using alcohol on plexiglass/acrylic.I am building a pretty large infinity mirror out of acrylic, and I learned a few things I will keep track of here.
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