Sand the piece of furniture down by hand with the 100-grit sandpaper. The surface of the piece should be rough to the touch when you are done.
Vacuum up any sawdust and paint dust from the sanding. Dampen a rag and wipe down the furniture to remove any left over dust particles.
Paint over the surface with a primer. Coat the whole piece with the primer and allow it to dry for at least 24 hours. Rinse off the paintbrush.
Paint the furniture piece with the high-gloss paint. Paint the entire piece of furniture and allow it to dry for at least two to three hours. Add a second coat of paint over the first coat for a smooth, high-gloss finish.