A mani-pedi appointment is a luxury carved out of a hectic weekly schedule for most people. It’s a time to relax, get pampered or prepare for a special event. As summer and wedding season approaches, the masses flock to salons for routine pedicures so they can show off in open-toe heels, sandals and flip-flops. Chances are these people are not thinking about cancer when they are staring at a rainbow wall of nail polish bottles deciding between colors like marshmallow, tropical punch and park ave.