Welcome Aboard.
Here is a link to an article that reviews non skid products, three of which are the type you're thinking of. There are others.
I understand that Treadmaster comes in different non skid patterns, some are less coarse (hard on the butt) than others.
http://www.boatus.com/foundation/findings/nonskid2.htm
I'm contemplating this project, so I hope you can keep us advised.