: ...It stated that the lip should be 1/4" thick by about 3/4"
: wide.
: Having cut some strips, 1/4" seems quite thin, is this correct ?

My coaming lip is 3/8" thick by 5/8" (off the 1/4" coaming riser), and looks just dandy. But then, spray skirts aren't a part of my life at present.

For whatever it's worth...
Kurt Maurer