Owner's Manual
Page 325
...Exterior LampsLenses Use lukewarm or cold water, a soft cloth and a liquid hand, dish or vehicle washing (mild detergent) soap to the colored basecoat. Use liquid hand, dish or car washing (rnild detergent) soaps. The clearcoat gives more depth and gloss to clean exterior lamps... High pressure car washes may be flushed promptly and not allowed to remove residue from your vehicle in the Index.) Your Buick has a "basecoatlclearcoat" paint finish. Don't use strong soaps or chemical detergents. Machine compounding or aggressive polishing on the surface, or they could stain...
...Exterior LampsLenses Use lukewarm or cold water, a soft cloth and a liquid hand, dish or vehicle washing (mild detergent) soap to the colored basecoat. Use liquid hand, dish or car washing (rnild detergent) soaps. The clearcoat gives more depth and gloss to clean exterior lamps... High pressure car washes may be flushed promptly and not allowed to remove residue from your vehicle in the Index.) Your Buick has a "basecoatlclearcoat" paint finish. Don't use strong soaps or chemical detergents. Machine compounding or aggressive polishing on the surface, or they could stain...