I was given a new product to test and its intention is just as you are describing your need.

Its sprayed, brushed, or rolled on. Its a clear liquid. I tested it on my old fiberglass Discovery canoe that was a bright teal blue when new. The product made my canoe look new and it stayed on. that was five years ago.

Everbrite, Inc.
955 South Virgina Street
Suite 116
Reno, Nevada
1 800 897 9629
fax 800 696 4249
email info@everbrite.net

Called Everbrite Protective Coatings.