Dan Koretz wrote:
He said
303 is no good for fiberglass and that I should buy a wax with teflon.

Use 303 on the deck fittings (anything plastic) and don't worry about the
fiberglass. Gel coat _is_ a UV protectant. Over a long period of time the gel
coat will show signs of oxidation. That's when you use a polishing compound
made for fiberglass to remove the oxidation layer. These polishing compounds
usually include a wax - 3M makes several that are good and can be found at any
marine supply shop.

Mike