I used a can of Krylon flat black spray paint on my 65. I gave it a full coat and waited 10-15 mins (in summer air) before recoating. I guess I got a good 3 coats on there before it started spraying thin. Holds up like a champ.
I've heard a few painters-by-trade say that brushing is the absolute best way to go but I prefer the simplicity of spray.
I can't seem to find any of the links, but here's an old discussion with some ideas:
http://reefs.org/phpBB2/viewtopic.php?t=51615