Thoroughly degrease the Al surface then only handle with clean gloves.

Apply Phosphoric Acid based treatment to etch the Al and then clean off excess. If not degreased first the P will not be effective.

Spray with an Epoxy Primer immediately after etching.

The Al coating is there as the Alloy ...

Summit Glow in Sheffield can do.

I had this done a few months back and a few items had to be scrapped as they wouldnt harden. Others were too hard so they went back in the furnace and then became S514.

A few kilo will cost around £50.

I have restarted my Acrosport II build after an overseas engineering career.

Is there anyone out there who could share some details of the plumbing and wiring?

Way back l visited John Kimber who built the same type.