A coat of nail polish might work.
Sparks
Bruce L W
BL
D000935:Antifungal Agents / Q000494:pharmacology*; D003358:Cosmetics / Q000494:pharmacology; D017449:Dermatitis, Allergic Contact / Q000517:prevention & control* / Q000628:therapy; D006801:Humans; D007764:Lacquer / Q000706:statistics & numerical data*; D009262:Nails
D000935:Antifungal Agents; D003358:Cosmetics