I accidentally washed part of the sandy/frosting stuff off the globes from our overhead light fixtures. I was able to completely remove it from one of them but the other two are being more stubborn. What might I use to more easliy remove this stuff from the others?

I'm surprised that the same method that got it off one one isn't working for the others.

Isn't that stuff kind of like a textured paint? If so, I'd try a razorblade on a small section... or an adhesive remover to give it a scrub.