My confession:
I was trying to remove the symbol of one of the translucent ponies, and naively assumed translucent plastic would work the same as opaque plastic. When a cloudy film appeared, it didn't register and Like An Idiot I added more acetone to remove the symbol and film, before I caught on. Now the back half of my pony has been eaten into by the acetone, and resembles something similar to beach glass >.< and the front still perfectly translucent.
I should have tested a small patch first! *kicks self* At least it still looks nice on the non-display side.