Buy the polish that has less of the bad stuff. In Aotearoa we have sustainable nail polish company Kester Black. They are a carbon-neutral company, B Corp certified, and their vegan brushes are well shaped. Their nail products are free from some of the nasties that are usually in nail polish, including formaldehyde, toluene, xylene, ethyl tosylamide and triphenyl phosphate.
Some other brands you could consider are Sienna Byron Bay, Scout Cosmetics, Butter London, and Hanami.
When your sustainable-ish nail polish is ready to be removed, use a nail polish remover from any of the companies listed, paired with a reusable cotton round (CaliWoods sell good ones) or a reusable rag.
Nail polish is not the best thing for the planet. But if you’re going to do it, choose the less toxic polishes, paint your nails as a treat, rather than a regular thing, and don’t be afraid to bring your own nail polishes to salons.
Manicurists are usually more than happy to use the polish you prefer, plus you’ll start a positive conversation that may encourage them to switch to sustainable polishes.