It would probably have to be something oil based. I'd worry that a high gloss latex on drywall could come out looking very bad.

Priceless picture. How large are those tile pieces? You've really peaked our interests. Huuuuuuury w/some WIPs. As CHICHEE said, we are NOT a patient group.

Consider three mirrors -- one over each sink and one in the center -- or an art piece in the center. Two larger mirrors would also work -- or the tower and a single countertop. But first, I would caution you to make sure your "great deal" really works. I think you need to do more than move the drawers -- the shelf is not showing at the same height as the drawer so that has to be moved, you are going to have exposed plumbing unless you add something to the open area, regardless of what side it is on, and the top is going to have to be modified for a countertop (the wood surround for a baby is not a good fit for a wet area) -- and that's assuming that the height is good. Changing tables tend to be lower than counter heights, so I suspect they would be better suited to vessel sinks than undermount. All of the changes risk damage to the cabinet (weakening it or requiring refinishing). I'm not so sure these are going to be the bargain you want them to be. Double check everything. If they don't work, it would be better to discover that before you start changing them so you can still resell them and recoup what you spent.

I am in a similar dilemma, in a long, rectangular box condo, with a fully mirrored back wall in the living area (I do have a dining table closest too it, or course, due to layout of space). I love the light and bounce back of the water view, trees, flowers, etc. My partner says "dated" because that is what he has heard, but as he has virtually no design sense of his own, I'm not putting much stock into his opinion. I believe it was actually a great idea at the time, and, despite the conversation about dining, etc., which doesn't really address the issue of being "dated", it doesn't really explain why a great idea has to be "dated" at all? I love the various spins I'm seeing on the mirrored wall now, and what I'm really seeing is that designers have gone back to realizing that this play on light and space is a great idea, particularly in today's world of shrinking personal real estate space. Most people don't live in large houses, and the majority of the world's population live in very small spaces. I guess there are ways to "update" the look, if it really needs it, but I vote to keep the mirrored walls!