If penetrol is not the answer, what is a good sealer / treatment for the deck and cockpit? I've used PoliGlow on the topsides with excellent results, but that won't work where footing is needed. Is there a product that penetrates, seals and provides a nice looking satin or glossy finish on weathered gelcoat (without getting slippery under foot). Our boat is a light beige 84 Hunter 25.5 so a little yellowing is tolerable.