A: The water spots you're experiencing could simply be from mineral deposits. If the spots are white, then they're from leftover salt or calcium after the water dries up. Acid rain spots, on the other hand, will actually etch the sunroof surface. Start by cleaning the sunroof with a good quality glass cleaner. Then, clean the sunroof surface with a relatively new detailing product called detailing clay. Detailing clay contains a mild abrasive that removes contaminants from glass and painted surfaces without scratching. Always follow the manufacturer's directions.

A: First, make sure that the surface in this area is clean. You can then try polishing the area with some wax and a soft, clean cloth. If this doesn't go far enough, use detailing clay (following the manufacturer's directions) and its fine abrasive to remove the plastic deposits. When finished, polish the area with wax and the cloth used earlier.

A: Start by cleaning the top with a convertible top cleaner, specifically made for this purpose. Depending on when the fabric protectant was applied, and the extent of the streaking, it may take several applications of the cleaner to get the top's appearance to improve and for the color to appear more uniform. Follow the top cleaner's directions on how to best apply and distribute the cleaner. Once the top's appearance has been restored, apply a convertible top protectant.

A: Apply specially-formulated wheel cleaner with a soft-bristled brush, thoroughly scrubbing the surface of the wheel. Do not use a wire brush of any sort. Repeat as necessary until the surface is clean. Depending on your type of wheels, it's possible that some of the pitting and discoloration may have been caused by a breakdown of the clear coat on the wheel surface, allowing moisture, brake dust and road debris to directly attack the metal finish. In severe cases such as this, restoring the finish may require more involved treatment such as glass beading and reapplying the clear coat.

A: Start by cleaning the glass with a good quality glass cleaner. Then, clean the glass with a product known as detailing clay. Detailing clay contains a mild abrasive that removes contaminants from glass and other surfaces. Always follow the manufacturer's directions. You can also use a commercially available glass cleaner specifically formulated for removing water spots. These products contain a chemical formulation for this purpose. Once again, always follow the manufacturer's directions.