I found this one on the net and looks good and not to high priced compared to
some others Ive seen. They all seem to use a inoized material that you can use over
just by putting rock salt thru it every so often. That will reactivate the the process
they use. So you can use the thing over and over again. Sounds good to me.

Ive seem some guys using them on their boats and they leave the boat fiberglass real clean.