There was a thread like this a while back and instead of it being "natural vs blue" it was "black vs blue", and black won.
Leah, I've used bother rollers and paint brushes to paint my tanks. It takes 2-3 coats to get a good non-translucent color going. The only shabby thing is that is does scrape off easily when you're messing around behind the tank. It's easy to touch up though!
