I'm planning to refurbish a Mosley Mini 32-AW beam.
Does anyone have any tips on cleaning it, what to use etc?

Thanks in advance.

Don't scrub any of the aluminium parts with steel wool, the fibres of the wool become embedded in the soft aluminium and make it corrode quicker with heavier salt deposits. Remove any white salt deposits but do not polish the entire length of the elements, it's a waste of time. Polish the ID and OD of any overlap joints, just polishing the the OD of the smaller tube is a waste of effort without doing the ID of the larger tube.

Use Scotchbrite pads, with a mix of brasso and WD40. Slot a piece of wooden dowel, and use it as an arbor in a pistol drill to make a polishing mop for ID pipes. You need to remove the resultant black mess. Hot soapy water is perfect for that, and finish it up with a IPA wipe to remove any remaining oils.

The caps should come off the traps with a good twist. Wear a heavy glove, don't grip them too tight, let the glove slip a little and the friction will heat the cap enough for it to pop off eventually. Remove any bugs or debris from the traps, check the screws / rivets are all tight and add SS star washers if they're not already there.

That's all very generic, but there's no point making any of it a mirror polish it's a waste of effort from an RF point of view.

Slight different to above.

I have used stainless steel scourer to clean it (they are like a flat wire, pieces don't break off) and then a thin coat of Tectyl 506.
Not being near the coast, Waxoyl would probably work too.

And as above for the rest.

Thanks gents, appreciated as always.
Some excellent tips and a cracking article Simon.

Do not rewind traps using copper wire, it will rot at the joint between the aluminium and copper.

Use Aluminium TIG Welding wire, you'll be able to source that locally. If not, let me know how much Al wire you need and I'll send you some.

That is where Tectyl 506 comes in again, spray it on the wire, aluminium and screw, tighten, and a light spray on top and it will never corode.