I'm thinking along the same lines. I used Velcro to hold he grab rail covers in place. See my note about posting pictures on the exhaust renovation thread, it's an easy fix. My next up priority project will be making a cover for my Gig Harbor dinghy that can be put on and taken off while the dinghy is hanging on the davits. This video for a Sunfish sailboat is close to what I'm planning with openings for the davit falls, except with two zip open collars for the davit falls instead of one for a mast and no pocket extending over the stern for stowing spars.Good idea on those grab handles as well! I bet I’ll have plenty of scrap as I ordered a yard of material for the mast cover. Please post pics after you get yours made. I am currently thinking a slip on cover with snaps mounted on the mast will be good.
Our masts look to be roughly the same shape. For some reason I can’t post pics and keep getting error messages.
https://www.youtube.com/watch?v=lrhtFxvC7Wk