Most modern automobiles and motorcycles use polycarbonate lenses for their headlights and tail lights.  This plastic is very sensitive to a variety of chemicals. Contact with certain chemicals can cause crazing, softening, or cracking of the lens, which would require replacement of the entire lamp housing.  That is definitely a bad thing.  So please be aware of this and avoid the following chemicals in cleaning or prepping your lenses before applying Lamin-x.

DO NOT USE ANY OF THESE CHEMICALS TO CLEAN YOUR LENSES!!! 

Acetone
Ammonia
Agitene®
Ajax®
Benzyl
Carbon Tetrachloride
Chlorinated Water
Citrus Orange Cleaners
Diversol ®
Gasoline
Isoprophyl Alcohol
Kleenol Plastics
Lemon Joy® (phosphate free)
Lestoil®
Liquid Cleaner - 8211
Liquid Detergents
Lysol®
Methyl Ethyl Keyton (MEK)
Oils
Pink Lux® (phosphate free)
Stanisol Naphtha®
Texiz-8006, 8129, 8757
Toluol
Tricholor
Triclene®