Leaning Post Installation - 18SF

[thealife]

Originally Posted by steel686

alife - I have been wondering about the aluminum backing plate issue and bonding with epoxy. If you skinned over the core and backing plates but drilled and tapped through would that be enough to let moisture out. Is that inviting water and would it be best to router out, skin the recess, and then epoxy glue plates to new cloth wet on wet. Not worried about huge stresses on the lean post but I am also trying to figure a way to put a pylon back with three or four solid mounting points behind the lean post.

The thing with alu especially in a marine environment is as soon as you seal it and you get the slightest bit of moisture in between it and whatever you coated it with, it, its game over, it will rot and the first place where this will happen is around the stainless bolts and this usually results on either the bolts seizing or the threads failing,

I would honestly skip the glass, use an epoxy primer or etch primer and screw from underneath if you don't think the epoxy bond will be enough

I manage refits on large yachts for a living, corrosion issues on "trapped" alu are the vain of my existence...