Some folks, have had some good results with bonding epoxy to aluminium. (Lotus Cars in Britain have been glueing car body parts together in their Elise series cars on a production basis.) The WEST system people have offered the tip that the aluminium part should be scuffed up prior to fixing, but not dry, brush epoxy onto the metal and then scuff it up under the resin, using 80 grit paper. This prevents the oxides forming and gives better chemical adhesion. I have tried it out, and so far it stayed put, I was a bit sceptical and made sure that the glued surface had a big "footprint". I guess that each application will need to be evaluated from an engineering perspective, to make sure that the loads across the glued joint give the joint the best chance of staying intact. Experiment a bit and let us know the results.

Don