With 60,000 Paint Pens sold, the unit cost has dropped to under $2 each. “We have sold over $1 million worth of Paint Pens,” she says. Wiener’s net is between 40 percent and 45 percent.

Dupli-Color offers a crafty pen-like system for touch-ups that match most OEM paint surfaces, but that's as far as the compliments go. It turned a deep, thin scratch into a bumpy red scar.

Keeping aircraft looking good can be done with a touch-up paint pen or a full paint job, which can be done as a stand-alone service or part of a broader maintenance package. Here are some options ...