Update on this. Got my LL Pioneer installed, and painted the inside with 2 coats of POR-15 Black Velvet paint which is rated for 1200*. Smelled up the house a lot when painting. When I did my first burn (last Sunday) it smelled a bit, but I expected it would with the first burn anyway. I had doors and windows open with a fan blowing the fumes outside and plenty of air circulation.
So far, so good with the paint. The stove is still burning, and paint is holding up. Will know more after the first season if it stops the inside from rusting/flaking.