Guess I have zero confidence in aluminum bonded to the surface of fiberglass, not that I don't use epoxy to bond aluminum pieces together that are not critical.  I'd be much more comfortable with a structure made from carbon tow or tape.  For one thing it conforms to the shape naturally.   Below is a before and after showing a shroud attachment on a KD 860 from Bernd's Utube slide show.   https://www.youtube.com/watch?v=Bv-ath_xmjY
    A beautiful finished product!  I assume from the angles that we are looking the same fitting on opposite sides of the boat.   Presumably the tape wraps down into the hull around a substantial wood reinforcing plate.   I'm curious what the bushing showing is?  Presumably a metal bushing goes inside of that.  Somebody put some real time into making it look good.

                                                                                                                                            H.W.





On 06/17/2018 07:36 PM, Rick Willoughby rickwill@bigpond.net.au [harryproa] wrote:

 

You get a good bond using that process.  The al;uminium will still slowly oxidise if the edges are not dealed and that will be difficult with a rubbing strip.

Glass is much harder than aluminium so a better wear rubbing surface.  I just use 400g triaxial tape for protecting contact areas.  Could achieve similar toughness with three layers of 200gsm tape.  There is no deterioration issue with glass on glass.

On 18 Jun 2018, at 10:28 am, Doug Haines doha720@yahoo.co.uk [harryproa] <harryproa@yahoogroups.com.au> wrote:

I used some metals one time in an older boat, and to bond it i put some wet epoxy on the metal surface and sanded it so the epoxy and the metal surface and dust particles were all being mixed into the slurry. Then add what ever you want to bond on with epoxy bog and glass or whatever.