Originally Posted by
old kodger
Not wishing to teach my granny to suck eggs, and I hope my comments are relevant. Many years ago, a company called "tor gem" made a solid fuel stove (heater), that had mica windows in the front I used to burn furnacite beads in it, they get very hot, and the result was that over time the mica "delaminated" and went hazy, not important in the stove, I only needed to see that it was glowing nicely, but where you need to see a process, that might be important.
I don't know if this is normal, but if it is you might want to design your door to be able to replace the mica without destroying the build.