I will be bolting 2 stainless steel
plates to the transom of my fibreglass boat into which I'll slot Weaver snap davits
(see Weaver Industries, Inc.: TRANSOM MOUNT DAVIT HEADS FOR INFLATABLE DINGHIES
) when I want to raise the tender
out of the water
for sailing. I have had the plates made in 316 stainless steel
(as per the attached picture which was taken part way through the process prior to polishing, etc) and now I'm wanting suggestions for the best way to fix them to the transom of the boat.
Of course they'll be bolted but I'm not sure whether I should have some layer of silicon/other material between the plate and the gel coat or just to bolt them on as-is. The plates are not 100% perfectly flat (although they're pretty good) so an intermediary layer might also reduce pressure-points, etc. It would also prevent any water
ingress around the bolt holes...
Is silicon a good material to use? Should I let it "set" before fixing the plates to the boat? Is there some better material? Whatever I use, I want to avoid it compressing later and the plates becoming loose if possible.