How to clean paint brush?

Put enough warm water into a container to fully cover the bristle paint brush. Add a little liquid dish washing detergent. Don't use too large a container as you will be refilling it with clean soapy water several times.

Dip and swirl the brush in the water working the soapy water into the bristles. Pour out the dirty water (see below for disposal recommendations) and replace with clean soapy water. Repeat until the brush is clean. Spin or flick the brush by hand or with a mechanical spinner to remove the water. (You can buy mechanical spinners at most hardware stores.)

First, determine which solvent is right for the nylon paint brush you are using. (The information can be found on the paint can.) Rule of thumb: use mineral spirits or paint thinner for oil-based paints, stains and varnishes. Use alcohol for shellacs. Pour enough solvent into a container to fully cover the brush bristles. Don't use too large a container as you will be refilling it several times. Dip and swirl the brush in the solvent, working it into the bristles. Repeat the process with clean solvent until the bristles are clean. Spin or flick the brush by hand or with a mechanical spinner to remove the solvent.