OK guys, here is one to sink your teeth into.

I was advised that the best option for cleaning growth off the bottom of a
fibreglass hull is Oxalic Acid. Apparently it does not damage the glass or
gel coat, but it literally strips any foreign matter on the hull clean off.

Has anyone had any experience with this?
--
Garry Beattie
Ocean Spirit Trailer Sailer &
Small Yacht Cruising Emagazine
www.ocean-spirit.com