Dilution Proportions for Oil Paint in Pneumatic Gun: Best Thinner Selection

Hello,
Are there any specific proportions with which oil paint should be diluted so that it is suitable for painting with a pneumatic gun? I wouldn't want to clog the gun with too thick paint and on the other hand I'm afraid to mix it up somehow because it won't cover. What thinner is best to use? Regular universal or are there any special thinners?

Firstly, the type of thinner should correspond to the type of paint, i.e. phthalic carbamide thinner to phthalic carbamide thinner, etc.
Secondly, there are no fixed proportions because two paints of the same density can have different viscosity, and https://pl.wikipedia.org/wiki/Kubek_wyp%C5%82ywowy is used to measure it. Too high viscosity - the paint is not well sprayed and "glues" fly, too low - the paint drips. The instruction manual should state how thick the paint is optimal for a given type of gun.

Thanks a lot for your answer. I'll have to dig through the gun manual then. I bought SICO M600. I know that this is not some sensational equipment, but apparently the cheaper ones are quite sensible and I will not buy a gun for over PLN 1,000, which I will use several times a year, in addition to painting some steel or wooden structures because I do not deal with car painting

The right thinner is essential, but its amount is best selected experimentally. When I painted with chlorinated rubber, I diluted it probably 1:1, and it was still mean. It all depends on the gun, its settings, temperature, etc.
It is always better to put several thin layers than one thick one. And buy yourself paint strainers.

lukpio3 wrote:

Are there any specific proportions with which oil paint should be diluted so that it is suitable for painting with a gun

In theory, spray paint for an air gun is supposed to have a viscosity of 30 seconds in a #4 Ford cup. You'd need a Ford cup and a stopwatch. Organoleptically, like paint dripping from a 1 mm wire, it's good, not drops. I really examine the paint (lacquer) organoleptically and make spray samples each time. Like "lamb" too dense; like streaks too rare. Each type of paint or varnish behaves differently. Practice really makes perfect here.
But we do the sample on a substrate very close to the original