In general, it's wise to get the floor plan and any back-of-the-wall structural needs accounted for first. You can get a faux-marble laminate or a cultured marble vanity countertop now and replace it with a genuine marble slab later, but if the sink's in the wrong place, you still...
After all of that, I brought a fan into the room to dry the tub completely. I let it dry for about an hour and a half while I had dinner, and then it was ready to paint. I wiped it down really well with a dry cloth before painting, and then did the “cutting in” with a b...