I thought I'd post this in case anyone else was thinking of tackling wheel refurbs themselves.
Over the years I'd touched up the odd nick/scuff using Titanium silver body paint.
I'd read that a lot of garages use it instead of Decor silver or Reflex silver as it was much cheaper and almost identical.
Correct.
However after a brush with a kerb last month I decided to bite the bullet and refurb all 4 wheels completely.
There was also some blistering on the inside.
In general I followed the process in the YouTube video below.
https://www.youtube.com/watch?v=_vMoHzBvu6w