Natural Wood Furniture & Floor Repair Makers For superficial scratches Step1: Choose the color that closely matches the surface to be repaired. For deep cracks Step1: Clean up and select a suitable color of wax filler; Step2: Warm the wax a bit up and draw over the cracks; Step3: Scrape off excess wax with a card; Step4: Retouch the surface by drawing over scratches with touch up marker.