Question: Nail polish only the top of  a fingernail
Options:
Cut a piece of  adhesive tape to fit the lower half of the fingernail, stick tape to the fingernail, polish only the top part of the fingernail avoiding the tape
Cut a piece of  adhesive tape to fit the upper half of the fingernail, stick tape to the fingernail, polish only the top part of the fingernail avoiding the tape
Answer: Cut a piece of  adhesive tape to fit the lower half of the fingernail, stick tape to the fingernail, polish only the top part of the fingernail avoiding the tape