Has anyone ever custom painted the "o" on the Flak Jacket vault? I don't have a display case yet, so all of my flaks are stored in a drawer in the regular black vaults. I wish I didn't have to unzip them all to see which pair I'm grabbing. I recently got a pair of Livestrong flaks with the yellow "o" on the vault, and i'd like to paint the rest of my vaults the same way but in different colors. Has anyone done this before? Any tips? Thanks!