I have posted some rustic tables that had defects (knotholes, voids, and hole) that required filling. This posting is a tutorial intended to explain how to use and tint two part auto body filler in your wood projects. There is a host of wood fillers on the market in a variety of colors- they come in tubes and cans and are great for filling small imperfections and nail holes, but none of them have the holding power of two part auto body filler, common brandname Bondo.
If you are going to paint the project you are working on, you can use the filler as it comes- part A which is usually gray or tan and part B (the hardener) that is usually red or white, although I have seen blue. It can be shaped, carved, and sanded to do most repairs.