If it says T-Cut…it works! T-Cut Headlight Polishing Compound is specially formulated to safely restore, maintain and protect all types of plastic, glass and acrylic headlights back to crystal clarity. Directions: 1) Wash with a quality shampoo and dry thoroughly, restoring one headlight at a time. 2) Use masking tape to protect the painted surface around the headlight. For Hand Application: We recommend using 2 quality microfiber cloths, 1 cloth to apply and 1 cloth to remove excess. Apply product to the first microfiber cloth and work in a circular motion to buff away any yellowing. Use the second cloth to remove any excess product. For Machine Application (Dual action polisher/rotary buffer): Only use for machine application when using the T-Cut Medium Polishing pad. Apply product to the polishing pad, working on a small area at a time, machine polish at approx. 1,000-1,800 rpm using overlapping motions. Use a clean microfiber cloth to wipe away any excess. Note: Not to be used on windows/windscreens.