The big secret in finishing wood is in the sanding. To speed up the sanding of flat surfaces when using a vibrating sander, some pros will insert two sheets of sandpaper into the sander at the same time. Then, when the top layer becomes either worn or ripped, they simply tear it off and the second layer of sandpaper is already in place.
For a ceiling fan to move the right amount of air, its blades should be set at a 14 degree angle. Blades set at a 10 degree angle will simply slice the air, while blades at a 20-degree angle will meet so much resistance that the motor may burn out.