Before attempting to clean or remove scratches, always make shure the plastic is cool to the touch. Usa a liberal amount of plastic cleaner to safely remove surface dust ad dirt. In addition, test scratch removers in a small inconspicuos area for compatinility.
The type of polishing cloth you use will make a difference. The ideal cloth is nonabrasive, absorbent and lint free. To eliminate any chance of scratching, use only disposable cloths. Reusable cloths can retain abrasive particles but you won't know for sure until the damage is done. Use a soft cloth ( such as a diaper ), avoid using polyster or rayon wipes which can scratch unprotected plastics.
If the damaged area is fairly large or badly damaged, a power buffer may be used with NOVUS No2 and No3. Use a clean cotton bonnet and operate the buffer at a low speed to avoid overheating the plastic, approximately 1,000 RPM. Each polish shoul be applied with a seperate, clean bonnet
Some plastics are coated with a thin film which may be damaged by the abrasives in the polish. NOVUS No2 and No3 polishes are not recommended for use on coated plastics or eyeglass lenses.