For colors, I use the "house brand" from Hobby Lobby... They're called "Fine Touch"... They're metallic and come in a 5 pack of gold/silver/blue/green/purple.... The silver is my favorite for coloring in Spiderman eyes....
Roseart metallics are also a great coverage choice... They're in by the regular markers...
I try to not have to use any white markers... just because they all take extra time to dry... any paint pen would.... But the "Painters Medium" found at Walmart in the CRAFT department work just fine...
Here's an article Bonnie Davis wrote a while back on BHQ about the markers she uses & why... as well as how she draws her dots, ovals & teardrops... She's a very talented artist... the "real" kind... which is what she did long before she ever picked up her first 260...
BalloonHQ Columns - Bonnie Davis