Guitarists have been using Krazy Glue for years to prevent the wear and tear that comes from picking strings. By adding a thin layer of glue and allowing it to dry, it creates a rock hard shell on fingers that help with pain when playing. To remove the glue, use nail polish remover with acetone and soak the glue covered fingers. Prone to sensitive skin and allergies? Skip this one and spring for a guitar pick, instead.