Rustcheck can't be painted over, but its supposed to go inside your frame where paint can't be applied. Both it and Framesaver are a kind of thick oil-based goo that coats, drives away moisture and keeps further moisture out. I have rustcheck in my frame. It's meant to keep canadian cars' wheel wells from falling apart in winter road salt so i feel ok about using it for my bike. Also theres a picture of a bike on the label. I hear framesaver works like boiled linseed oil, goes on thin and then hardens.
Last edited by mander; 01-17-07 at 12:20 AM.