Re paint flow, I often wondered about keeping the part turning. Where possible?
if I understand correctly you are asking about paint flow and turning the wheel.. I need to turn the wheel for every spoke to spray at a correct angle for my hand and visible light.. because if you cant see what you spray you cant paint properly.. as I paint every piece in 12-16 steps ( 4 per every go-depending on part) and spray nozzle to minimum, flow is not a problem except the center holes..
ps: spray gun 1.0 micron small hvlp , bigger guns not suitable for that job
I understand that. Well, as much anyone can with very limited experience of spray painting such as me anyway
Merely referring to flow in isolation and drips or runs in the paint. If the part being painted is turned constantly, or as soon as the paint is applied, then gravity can't pull the pain as much and then allow either more paint to be applied, or less time to allow flow.
Eg, I once really struggled with painting a motorcycle petrol tank. I guess the paint was too thin, I don't know. But I got round it by placing the tank on a spit type arrangement, as the tank was off a bike with a spine frame so was a saddlebag style that lent itself well to a spit, which I could constantly turn at a slow speed.
Same amount of paint applied, but as it was rotating slowly, the paint didn't run.
It was just an idea really, that was also triggered by the way the wheel is mounted in the pic.

Nice job.
