The plinth is back from the powder coaters - sand blasted then plain black all over. I didn't ask them to do it and didn't expect them to, but they powder coated the underside as well.
Before:
(I bought a cheap tatty one from eBay, so I can if needed, return the deck to stock)
https://i.postimg.cc/85nPK0Bb/1000004995.jpg
After:
https://i.postimg.cc/ZnBY1xVc/1000005121.jpg
https://i.postimg.cc/D0JftPB6/1000005122.jpg
Very pleased :)

