Buy a mirror. Put letter stickers on it. Paint over the whole thing. Peel off stickers. (use canvas instead of mirror. Paint canvas what color you want your letters to be first, then letter stickers, paint over, peel off)
paint Vaseline over any tiny areas you don't want painted, like screws or hinges. use a thick layer, then paint as normal. after the paint has dried, go over the area with a paper towel and the paint will wipe right off
creating a soft black color using ASCP. Put Graphite ASCP over a coat of Aubusson Blue ASCP for a "very soft rich black". Put a coat of clear wax over that and end with a coat of dark wax. You will have a "deep, rich, but soft black".