I checked out the acuglas and as you just stated it can be filed and sanded. At $25 for a kit plus shipping it is a bit pricy for the amount I need. The only advantage I can see in it is the dye to blacken it. I have some JB Weld hardening up down in the basement (I always have some on hand) and I'll sand it a bit and see what I can do about matching the color of the frame with magic marker or dyes. If I have any luck with the color I'll give it a try on the frame. I am very sure it will stick.