3. Light Buffing
Lightly buffing your fingernails can remove some discoloration from the nails. It also improves blood circulation in the area, which promotes healthy nail growth. However, this process must be undertaken with care.
Be sure you’re using a high-quality buffing tool, and buff in only one direction. Buffing your nails too often or incorrectly can make them weaker, and broken nails are far worse than discolored nails.