I did a deal with my mate using his yard and doing both his Mercedes people carrier and my van. His Mercedes needing some tricky welding

Nearly all of my experience is with cellulose and successful apart from a few instances of reaction when someone had used household paint or silicon polish. I was not very happy about when cellulose got banned.
I was pleased to find that his colour - Mercedes Hyacinth Blue - could be mixed in cellulose and so presumably I could have the colour of my choice mixed for my van. Sadly though cellulose was not available eight years ago when I did mine so I had to use synthetic again

So it would appear that cellulose is available now in common commercial vehicle colours and by inference any colour mix of your choice given that the supplier has mixing/formulating capability.
In the event the cellulose went really well on the Mercedes - even blending on a part panel repair while I did the hang of the synthetic on my van apart from a couple of runs. Her Ladyship is well impressed

Any other back street respray practitioners on the forum?
CS
PS My compressor is a 1960's Triumph Tigress 250 cc scooter engine with the crank rearranged for 180 degree throws sitting on a Calor Gas bottle alongside a 2 HP electric motor.