There is subway tile in our hall bath in the condo. But in the house we have a gorgeous huge shower with large tiles, and the tile looks great--the grout has looked awful for a long time. I guess it was not sealed. And I think we have lime/calcium buildup.But this makes me paranoid about that in the condo bathroom and five times as paranoid about using it as a stove backsplash. I cook a lot, and the stainless backsplash we have now does not look great. Is it sealable to the point that it becomes a solid surface? The other thought was just get a piece of the black galaxy that's already on the counters. But the place was built about 7 years ago, so it definitely won't be from the same place. Help!