Refinishing cultured marble involves cleaning, repairing, sanding, priming and polishing the marble surface. The necessary tools and materials in this project include a sponge, soapy water, distilled water, marble primer and a stone-finish solution. Marble polishing powder, medium-grit sandpaper, a suitable nonabrasive cleaner, a rag and a paint roller are also handy. Be sure to protect your eyes and hands with goggles and gloves respectively before attempting this task.
To clean the surface, soak a sponge in the soapy distilled water before wiping the surface with the sponge to remove all dirt, dust and grime. Remove any stubborn stains from the surface by applying the cleaner with the rag before rinsing the surface with the distilled water. Allow the surface to dry.
Repairing the surface involves filling any gouges and cracks on the surface with the marble polishing powder, using the applicator that accompanies the powder. Sanding the surface involves smoothing and evening the surface with the sandpaper, taking care to apply moderate pressure to avoid gouging the surface. After sanding, vacuum the surface of dust, and sand again as needed to achieve better results. Vacuum the surface again before priming.
To prime the surface, paint it with the primer by using the roller, and let the surface dry. Finally, polish the surface to make it shiny by applying the finish solution, and let it dry.