Two weeks ago I bought a new American Panel 48" x 48" asian slate double cut hearth pad from one company; it's a beauty. Then I bought a new stove from another company. The stove installers scraped the finish on the new hearth pad in a few spots. Does anyone have any ideas on how to touch-up the pad? The two scrapes are about 1/2" by 2" in size? I think the multi-colored pad is made of a thinset with what looks like a clear coating of some kind. I'd appreciate any advice I can get. Perhaps, I just need to learn to live with it.