This is a test of commonsense. Complete the next sentence:

How to fill nail holes
Mix dry powder filler with water according to the putty manufacturer's instructions.
This form of putty should be mixed to a stiff consistency.
Pack each nail hole full of putty with a plastic dish scraper and add extra putty so you create a slight putty mound.
As the putty dries, it shrinks. Adding extra putty allows for this shrinkage, making sure the nail hole has been completely filled.