The acrylic ports on underwater video and still cameras seem to be rock and coral magnets.

As long as your port does not have some sort of allegedly scratch resisitant coating, then the followng product is what you definately need to always have with you on any dive travel.

Our publisher takes the kit whenever he travels with his HD videorig. It is a total trip save and port saver!

Micro-Surface Finishing Products

The acclaimed particular kit to get is Micro-Mesh NC-78-1 ACRYLIC RESTORAL KIT