Just had a customer bring in an oversize print that had fallen off the wall and all four corners of the frame broke. I was able to shave a paper thin slice off each miter to give me a clean surface to glue, but was concerned this would shrink the frame just enough to make the customer's acrylic too tight. The print was framed with spacers so the acrylic was cut pretty tight. Luckily, it did fit back together fine, but I was wondering if it hadn't, how to trim just a hair (maybe 1/16") off acrylic. Scoring it would take too much. All I could come up with was taking it out to the sidewalk and taking a belt sander to it, but I thought there must be a better way. Any ideas?