Putting a Clear Coat on Painted Wood. Place dropcloths on the floor and nearby furniture pieces, countertops and other surfaces surrounding the painted wood pieces you are going to cover with a clear topcoat. Wipe the painted surfaces with a damp rag to remove any dust, dirt or other loose debris. Dip the tip of a foam.
Use this Home Depot guide to find the ideal clear coating for your wooden floors, tables, cabinets, etc.. types of clear finishes available and the applications where it works best.. Always apply paint and stains in well-ventilated areas.
You can't do better than clear polyurethane when you need a protective coating for painted furniture. It adheres to almost anything and after it cures, it's as hard .