What are the best techniques for applying and smoothing white wood putty for a seamless finish on woodworking projects?

The best techniques for applying and smoothing white wood putty for a seamless finish on woodworking projects include using a putty knife to apply the putty in a thin layer, pressing it firmly into the wood grain, and then using a damp cloth or sandpaper to smooth out any excess putty and blend it with the surrounding wood. It is important to work quickly and carefully to achieve a professional-looking finish.