My advice would be not to touch the bottom of your ski. I think the manufacturer has probably figured out the best way for the bottom of your ski to work and messing with it will effect how it rides.
At least some Goode skis were released with a factory-painted bottom, and they sell (or used to sell) repair paint for the do-it-your-selfers.
Historically, Goode skis have performed pretty well, so you might be able to apply what they used without harming your ski's performance... or not.
I'd try asking them at http://www.goode.com