Some say urethane is a rougher, tougher, safer way to protect yourself from buttons made of nickel. U-40 Perma Gloss is a urethane rod finish, meaning it was built to protect your fishing rod from the elements. This stuff is super strong and long lasting. Build a barrier between you and your buttons or jewelry made of nickel. Brush on a few coats of U-40 Perma Gloss with a Q-tip.
Nickel-free belt buckles, banish that belly rash!