Here's an armboard replication in aluminium. 10mm thick.
From finish to start.

Black lacquer and M3 caphead bolts for SME armbase mounting.





Etch primer phase. This gives a secure base on the aluminium for the top coats of lacquer.



The bare aluminium board. All fitting holes and shaping done



Cut to shape. Alongside the wooden board it will replace



Will be posted off once the lacquer is fully hardened.