Step 1: Start by preparing the surface. Remove existing paint or varnish using acetone, or any other product for this purpose. Then, sand the surfaces with rough sandpaper until the previous color disappears completely. In order to finish the preparation of your surface, sand with a fine-grit sandpaper. Step 2: Apply your new stain or paint color. Step 3: To facilitate the weekly cleaning of the furniture, apply a water-based satin varnish.