Welcome to the forum, No flat top doors were nickel or brass plated. They were painted black ONLY. Stove Bright Satin Black is closest to original. Many highlight trees with silver or white paint. That was not original. If you have a hammer drill that can switch from rotate only, or hammer and rotate (masonry drilling) or hammer only, a chisle in it in the hammer only position breaks them right up. An air chisle works good too, but the air exhaust blows dust around so much you need a resperator and eye shield. (should be used with electric hammer drill as well) Otherwise a hammer and chisle isn't bad on a double door stove. Hold the chisle with vice grips or a chisle holder. The deep Mama and Papa is much more difficult. Ear plugs are nice since you will be close to the door hole you're working through. Once one gives up, it gets easier. Draw a diagram of how they are installed. Rear first, then sides, then bottom. Ace Hardware is the cheapest I've found by the box. They are easily cut with masonry blade in circular saw, dry. Score and snap. They cut clean.