Thanks for taking the trouble to respond.
I think I shall be using this method.
Richard

HI there, I agree with Mark in all my experience that epoxy is very secure and sensible for most applications.

I have also used a contact adhesive which works on most surfaces too.

Good luck with the project
Roy

HI Mate

Ruff up the area that the fittings are going, (just enough to remove the gloss) I then use 5 min epoxy, gives a little working time. Have used medium cyno, one drop on the bottom, but little working time, it tends to be quick.

Could use thin cyno place the fitting then put a drop at the edge of the fitting and allow it to flow under to make the bond. (fitting must be a good fit to the deck curve)

Hope this helps

Mark