for those who like OTRs
not many people know about these:
Terra Cotta Paint pens. They're for painting terra cotta pots, but more importantly, they're built just like a large OTR, but with a better valve and stronger nib. Oh yeah and they cost three bucks at your local art store. Better than buying some fancy .60 and emptying all that metallic paint out. If you rock the panels on buses these are a must.