copper jewellery from oxidizing whilst wearing it, at least for a time, you should do the following:
- If you are unsure whether you are allergic to nail polish or not, apply a small amount to your skin and leave to dry. If you don’t notice a reaction of any kind (such as a rash, itchiness or hives) you are free to continue.
- Coat the inside surfaces of your copper jewellery with a layer of clear nail polish. If there are other areas of the jewellery that touch your skin, make sure that you coat these, too.
- Leave the nail polish to dry completely be wearing the copper jewellery. Keep in mind that this protective coating will wear away over time, so you should reapply the nail polish if you notice the green marks reoccurring.