Rubber Mask Grease Paint or RMG for short are designed specifically for use directly over latex or foam latex surfaces such as masks, fake wounds, bald caps, or other latex and foam latex appliances. RMG contains Castor Oil, which coats appliances and the surrounding skin with sufficient oils to allow the latex piece to appear natural instead of chalky. RMG is highly pigmented, yielding great coverage over a wide variety of skin and fake skin surfaces.