Dust the faux marble object once a week with a soft cloth. Do not use abrasives for cleaning. Test a mild all-purpose cleaner on a small, hidden area before cleaning your faux marble with it. If the surface is not altered, you can continue with cleaning the rest of the object. Spray the cleaner on the faux marble and wipe clean with a damp sponge. Rinse the sponge with water and wipe away any excess cleaner. Dry the faux marble with a chamois or microfiber towel.
Restore the shine of your faux marble with wax or fiberglass polish. Do this twice a year or as often as needed. Apply a thin, even layer of countertop wax or fiberglass polish with a soft cloth if the faux marble looks dull. Allow the wax or polish to dry to a haze, then buff the faux marble to a shine with a clean, soft cloth or chamois.