Also called scar wax or scar putty, it can be used on the skin to build up lacerations, bumps and lumps as shown in the photos. The wax can be made more durable by an application of spirit gum on the skin before applying the wax. If you dab a cotton ball into the adhesive the cotton fibres stick to the skin providing additional grab for the wax.
Cover with latex (improves durability and the ability to accept makeup) and makeup to finish the effect.
When finished a piece of dental floss slid under the wound will remove it easily.