TIp nozzle sizzes

Hi I was wondering if anyone can help me out with tip nozzle sizes for basecoat
clear coat
primer
Are you suppose to use different nozzle sizes for this 3 things
I've heard that for
Basecoat: 1.8mm
Clearcoat: 1.4mm
Primer : 2.2mm

Is that right or it does not matter, Thank you

I use a 1.4 for Base/clear, a 1.8 for Highbuild. However, I use a seperate gun for priming since it gums up and I dont want to ruin a base/clear.


Also check. http://www.automotiveforums.com/vbulletin/showthread.php?t=349110