On Sun, 28 Oct 2007 10:22:52 -0400, "Reginald P. Smithers III"
wrote:

I would not use Bar Keepers friend or any of the other abrasive cleaners
on fiberglass, while it is a mild abrasive, I would be concerned it
would just make it harder to remove the gunk next year.

It will destroy the gloss finish just like Zud and Soft Scrub. If I
need an abrasive to remove scratches, I start with 3M Finesse It and
work up from there. Less is better.