I have a 1/4" thick coaming lip that extends about 13/16" from the face of the coaming riser. It is ideal for bungie'd sprayskirts.

With a rubber rand, I would want a less deep lip. (for safety)

Shawn

: I used a 1/2" lip on my skin boat and it works fine. I think the key is
: to keep it thin; mine is 1/4". If you use a 3/8" or 1/2"
: thick lip, the skirt doesn't get as much purchase on it. It's like the
: difference between the coaming on a molded boat and on a 'glass boat. The
: latter holds better.