What is the purpose of sanding the fillet under the cockpit coaming? Is it to smooth it out? Is it to make sure the epoxy will stick to it? I did apply the fillet and it has been over 24 hours so it is now fully cured and I believe the next step is to sand it, but I am not sure how much sanding to do. Just to smooth the sharp edges or do I sand it all, even the already smooth areas? Thank you very much for your advice. Diane
It’s to make it smooth. A smooth fillet does a better job of eliminating stress concentrations. It also doesn’t snag any glass cloth that may come into contact with it.
Dowels or pencil-sized sticks of foam can be wrapped in sandpaper to make sanding tools that fit under the coaming.
Laszlo
smooth is important not only for not snagging glass….but for snagging anything like a skirt or your fingers which may run up along the underside of a coaming and come into contact with underside of the coaming, the riser or the sill.
nothing worse than cut fingers/hand when kayaking. which is also why you should inspect carefully the inside taping of the hull/deck seam and anywhere around/inside the hatches….and smooth it down/take it down with some sandpaper before final finishing….
h