A: You already have at least a 3/4 subfloor installed of some sort. If this subfloor is chip board, then you will need to install some real wood plywood over top, screwed to the joists. 3/8 plywood should be fine for this. Painting the subfloor will have no effect on installing solid hardwood over top. As long as you are using a nail down product, rather than a glue down, it is OK to paint the subfloor.

