Final answer:
Surface restorative art is the preparation used to lighten an area before applying a thin layer of wax over an abrasion, which helps blend the abrasion with surrounding tissues.
Step-by-step explanation:
When a thin application of wax is placed over an abrasion, the preparation to lighten the area typically involves surface restorative art. This technique involves using cosmetics, wax, and other materials to reconstruct or cover the abrasion and create a more natural or lifelike appearance, especially useful in funeral service practice. This procedure helps blend the area with the surrounding tissues, making it less noticeable. Prior to applying wax, it's crucial to ensure that the skin surface is clean, dry, and if necessary, treated with a sealant to provide a base for the wax to adhere.