What is the nature of the work to be done? Something that can happen between tide changes?
I built my Searunner
40 with the capacity to haulout on a sand beach in quiet water
. I used graphite powder in the West system epoxy
to give it extra abrasion resistance. It worked well, but the truth is, it served little purpose since most work requires time, power tools, and tends to pollute the immediate work area, and the places that need the most work are sitting on the sand. It's better to use a yard and have the boat hanging by the underwings exposing the entire surface area of the hulls.