Hi Gents!
"colour cup" sounds good to me.

My airbrush is a Paashe V, to clean it I usaually spry denaturated alcohol throug it, but I usually dussassemble it too....
Could be what Uncle Tony said: the solvent clogged something in the process...
I'll let you know how it goes....
In the meanwile, thank you for your tips!
Ciao
Edo