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Originally Posted by blindxeyed  Awesome diagram, thanks! Now I just want to clarify this:
So place it in the oven.. once it starts to sag in the middle, that's about when you should take it out? Once its out, you placed it over the plaster mold, and used the outer light trim to compress it down over the mold. Correct? How large was the sheet of plexi-glass you used to do this? Not much larger than the metal trim I assume? |
As I was saying before, you will find the happy spot through a bit of trial an error. Every oven and batch of Plexi seems to be just a bit different. Wait just a bit longer after it starts to sag. Maybe a minute or two. I just happened to get a feel for it after doing it so many times.
The size of plexi was actually quite a bit larger than the trim ring used to push it down. Some of the plexi will stretch but it will reach a point where it needs more material to work all the way down. Be generous very generous with the sizing.
Good luck.
Thanks for the compliments everyone.
-brian