I sanded my stepped sponson modification, and I put a coat of 5min epoxy over it all and sanded it smooth. Ready for final sheeting. After the sponsons are fully sheeted, I'm gonna re-sand the bottom of the deck and re-seal it. I noticed some cracks in the epoxy around the base of one of the sponsons that I want to repair, but in order to repair it, I need to get back to bare wood. So anyway, a little more work, but should make it more sturdy and maybe lose a little tiny bit of weight.