Ann, could post some photos after you are done? I am thinking I may paint mine but I want to know if the paint works. I may wait after your have used it for a spell first. Last year was my first insert and we used it 24/7 for heat and it kept house toasty all year long. We got ours used like you did, but ours didn't have the rust you have on the top like yours has.
Robert
Robert