I was introduced to "3M Bondo Home Solutions All Purpose Putty, 1-Quart" by a professional painter last year. It is wonderful stuff. It is a two-part product that is very easy to use. It can fill deep holes because it hardens quickly chemically, not by evaporation. While it is hardening, it is easy to trim with sharp tools. After it is full hard, it is easy to shape with a portable sander or die grinder. Use a dust mask. It is $9.23 Prime a quart on Amazon today, cheaper than last year when I bought mine at the paint store for about $12 a can.Larry