I need to put a piano finish on parts for a bed. By piano finish, I mean a gloss black which is so smooth that you can't tell there's wood underneath it. I only spray waterbornes, so traditional piano finish schemes don't exactly work. My plan is to start with a fine-grained wood - likely soft maple - sand carefully, and apply primer. The primer I'm considering is General Finish's sanding sealer, colored with black UTC. I'll apply primer, and resand. My aim with the primer is to fill any wood pores, and nail down any little whisps of wood. I may need several cycles of primer and sanding. Eventually I should get to a surface which is completely primer and has no hints that wood is underneath. At that point, I'll spray with gloss black -- likely General Finish's Black Poly -- for 2-3 coats.

Comments? Advice?