I see there is a lot of laser enthusiasts on this site (including myself), so I decided to share some of my experience of making front surface mirror....
Step 3: Remove protective paint from back side of mirror
At first use paint remover. I think any kind will work well. Just one thing to remember. It will dissolve acrylic, so work fast and carefully. You ca...
I don't know if it's acrylic mirror I use, but even the most delicate painter's tape, will strip away pain and mirror finish when I remove it :( Good news is that you don't have to put it on at all. Instead of file I used dremel with sandpaper and it's very good for rounding square off. It melts plastic off, but leaves edges smooth, and it's really much faster than file :)
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