Tim Downie wrote:
I've an idea to create a memorial post for a departed friend which would
consist of a domed metal cap on a 4"x4" post.

I had originally though of making the cap of lead but a quick google
suggest that lead "burning" is well beyond my skills & equipment levels
so I wondered if either I can work the lead "panel beater style" to
cover the top and extend down the sides for a few inches or whether I
should consider a different metal like an aluminium alloy.

Of course I could just contract the work out to someone to do properly
but I'd like to have a go myself.

Any suggestions?

Tim

Copper? You could solder/braze it.