Man, am I going to have a difficult time articulating and getting all the details right. LOL
Essentially, this:
I want to have a board with a square hole centered in the middle which will be covered by a photo. I tested it, and it does backlight well.
Do you think I should prefill that hole, let it partially cure or fully cure, and then place the photo over it and finish the pour? Or put something like plexiglass under the photo and pour it all at once?
Also, I will be backlighting with LED strips. If I put them in the epoxy I’m a bit concerned about heat and the fact that I won’t be able to change them if there is a failure.