This happened because in Bruce Chandler’s Rossean Hotel post, we got off topic and started on making windows. Again. I wanted to throw in another two cents worth, but rather than steal Bruce’s post, I decided to put this valuable information to where it’s more visible. My apologies for dredging up an old subject, but I figure it’s kinda like training your dog. Sooner or later he/she will learn to sit. No, you will not receive a doggie treat for reading this post.
Let’s see–work surfaces that don’t eat your styrene. Here I’m using a glass tabletop 'cause it’s what was out there on our lanai (patio) when I was working. As I said, not much sticks to glass, certainly not sytrene and MEK. And if a piece does stick, I pry it off with my hobby knife.
Jigs: since these were simple, square, window frames, I didn’t really use a jig, just a block of wood in the corners. Sometimes I use one of my metal hobby squares, which I bought from Micromark, but here, I just braced the bottom piece against the curved edge of the table and hoped for the best. Now if these were multi-pane windows, the kind with muntins (not mullions!), some sort of a jig would have been called for. But these were just straight-cut pieces of styrene, stuck together with MEK (the stuff in the little jar).
Straight cuts: Mr. Chandler and I had a misunderstanding in his post–about angled cuts. I thought he was making 45-degree cuts on his Chopper, because the first photo he included was of someone, perhaps not Bruce, doing so. In reality, Bruce had made 90-degree cuts, which is what ya get if you don’t cut at an angle, but just stick the styrene strip up against the fence and chop away. If you look at his windows–and mine–you’ll see simple, 90-degree cuts. FYI, I have done 45-degree cuts, but they ain’t worth the extra work.
Hope this 'splains everything. Bark once if it does. 
