This is the brush assortment I was speaking of. At five bucks a bag, it is hard to go wrong.
http://www.harborfreight.com/9-piece...set-90631.html
If you need more umph, here is a metal bristle set.
http://www.harborfreight.com/10-piec...kit-95947.html
Seven dollars
For certain things, I swear by harbor freight.