This clear product can be painted on any piece of jewelry to prevent skin discoloration or irritation due to allergies. It is also helps to prevent your piece from tarnishing. You can apply up to 3 coats, just wait for each coat to dry before applying the next. The shield will eventually wear down with every day use and can just be re-applied when you need a new coat. This product will make your piece shiny. Comes with brush in bottle.Learn how to work with Jewelry Shield in a safe manner as well as more about storage, disposal, protective equipment, and spill-handling procedures by clicking on the Materials Data Safety Sheet.