I put away my Sunrader for the winter. Luckily in the Portland, Oregon, area it doesn't get too cold during the winter months. In addition to draining the water lines and tanks, I covered the Sunrader with a large waterproof tarp. In the spring I would like to look for someone who could (not sure what term to use) clean and polish the fiberglass shell. What type of company or service would I contact who could do this for me?