Soft Scrub with bleach works pretty well.

"Rob" wrote in message
om...
Bob,

Depending on where the marks are and in what condition your
fiberlglass is in: Comet or Ajax works great but be carefule not to
scratch ths finish. My boat is older so it does not scratch the
gelcoat finish bc its faded or have any effect on the non-skip area.
The same thing just happended to me this past weekend!


Bob wrote in message ...
ammonia...

Guillermo wrote:

Hi,

After our last trip I realized that one my crew members had
semi-marking
shoes. I have shoe marks everywhere in my non-skid surface deck. Is
there
any product out there to remove these marks easily? I tried water and
a
generic marine soap, but it does not work.

Any help, tips or techniques will be greatly appreciated.

Thanks,
Guillermo