I copied the following from the Klasse website. I have used Klass products on my cars and Class B motor home for some time. I don't know about the All-In-One polish on just fiberglass (although I have always covered the entire car, glass and all), but the sealant worked very well and applied easily. It seems like it would work with fiberglass. Anyone else use it?
From the product page...Klasse High Gloss Sealant Glaze is a highly concentrated acrylic formula glaze for new cars and oxidation-free surfaces. High Gloss Glaze provides an additional protective layer over the All-In-One with an exceptionally brilliant mirror-like shine.
High Gloss Sealant Glaze creates an elastic, non-chip, shrink-proof, heat and scratch resistant - protective seal against ultraviolet rays, salt water, acid rain and industrial pollutants for up to 12 months. Use this glaze on all paints with or without clear coats, glass, fiberglass , Plexiglass, plastics, metal surfaces, enamel, tiles, Formica and all non-porous surfaces. It is anti-static, non-abrasive and contains no ingredients harmful to paint, metal or plastic.
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