I asked what the process was, and it’s this:
Wheels removed from car (usually 2 at a time), all work carried out inside my van
Tyres deflated and pushed back from the rim (Break the bead)
All damage, stone chips, flaking lacquer/paint removed, sanded down through 5 grades of paper.
Whole face of wheel prepared for painting by 'Scotching' all surfaces to provide a key.
Wheel de-greased and de-siliconed
Tyre wrapped in protective film
Wheels taken to spray booth where they are painted using primer, water based paint and a high gloss two part Lacquer
Lacquer cured under IR lamps for 20 minutes
Tyres unmasked and re-inflated to the correct pressure before refitting to the vehicle, ready for use.
This takes approx 3 - 4 hours per pair to complete, once refitted the other two wheels are removed and the process starts again.
Complete job usually takes 6 - 7 hours in total.