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Post by Citabria on Aug 13, 2009 16:54:28 GMT 12
Hi Guys, Now that my compressor is back from the repair shop after my first attempt at controlling the pressure snapped the regulator off!     Best I ask for some advice... I've bought one of those little spay guns for models and was wondering what PSI I should operate it at...? I can now wind the compressor down to 30 odd PSI and wondered if thats the best operating pressure for two pack paint. Thanks in advance.. Andrew "Ham Fisted" Hope |
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Post by mstokes on Aug 13, 2009 17:43:02 GMT 12
Andrew, hope I can be of some help mate.
With my compressor and airbrush, I almost exclusively spray at 20-23PSI. Before I spray though, I add thinner (in my case enamel paint and thinner) in a 50/50 mix, then adding from there one or the other until I get the consistency of milk. This helps the airbrush spray the paint in a thin layer without drying or atomising it too much.
I am not really sure what two pack paints qualities are, but my placard for my airbrush I have worked out to be
Normal paint (Enamel and Acrylic)
Thin to consistency of milk, usually 50/50. Spray at 20-25 PSI
Alclad Lacquer
Do not mix, shake well. Spray at 10 PSI at most
I have had no problems sticking to this.
Hope that helps,
Mike
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Post by Bruce on Aug 13, 2009 17:46:39 GMT 12
are you talkng airbrush or something like an automotive touch up gun?
My airbrush compressor (which is direct feed - no tank) sits about 30-40, but is tweaked to suit at the gun. A touch up gun generally should have the compressor set to about 30-40 too, but it depends on the tank size (how quickly pressure drops off while spraying) and viscosity of the paint. Igenerally find the built - in regulators on compressors arent great, so I have an additional regulator and water trap downstream (and its amazing how much water gets in it at this time of year!) and I set the line pressure there. Call or e-mail if you need more guidance.
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Post by Citabria on Aug 13, 2009 17:57:40 GMT 12
Thanks Guys, I got it from Super Cheap Auto... yes I know  It's only very small like a pen.... I have an industrial compressor... but the (new :  regulator seems very good and sensitive. I'll have a go and see what results I get. It's not for models so I don't need it to be too sensitive more for horse float touch ups. I just didn't want to blow it up... with 150 PSI! Cheers Andrew |
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Post by Deleted on Aug 13, 2009 23:03:54 GMT 12
Hi Andrew, SuperCheap sell all 3 kinds of Chinese airbrushes, they sell Badger 350 knock offs, Badger 150 Knock Offs (double action), and Iwata HP-C knock offs (double action). Typically the first one will operate between 18-30 psi, they don't spray that fine. The other two should operate from 10-25 psi. Lower pressure will give you much less over spray and time for the paint to settle on the surface, with the increased risk of splatter, and runs. There is an article I did in this forum else where.
PS. Running your airbrush about 40 psi is dangerous.
Regards
Kerry
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Post by Dave Homewood on Aug 14, 2009 0:05:21 GMT 12
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Post by Citabria on Aug 14, 2009 10:17:16 GMT 12
Well I'll be... thanks for the info Kerry.... it's a whole new world for me!
See there is no question that cannot be answered! ;D
Cheers
Andrew
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Post by Deleted on Aug 14, 2009 22:02:33 GMT 12
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regulator seems very good and sensitive.
