Spraying unifiliar paint with touch up gun

J

jbird988

New Member
Hello, I am kinda of new to paint but not entirely new to using a gun as I cerakote frequently and have sprayed out primers many times with full size guns. I have a few touch up guns being a astro pneumatic and a few iwatas with 0.8 tips.

I have a small cast iron casting that has many nooks and crannies, lots of stop and go type spraying that I would like like to spray with some single stage. I know tip size is kind of a relative thing but I am not sure If I would have any issues with this paint using a 0.8 tip as the paint manufacturer recommends using a 1.2. If anyone has any insight on this I would like to hear. Thanks
 
If you have to use a small tip like that on something like single stage, you would need to reduce it more than you would with a larger tip. Essentially you would have to over-reduce to get some SS's to spray out of a small tip like a 0.8 Whether the paint can handle being over-reduced depends on the paint. If you have to shoot it through that tip, I think using a base/clear system would be better. Base would not be a problem through that tip and a clear like SPI Euro you could reduce it up to 4 (clear):1 (activator):3 (reducer) which would lessen the viscosity and should let you shoot it through that tip. Or experiment with a single stage, reduce it see how it looks. You'll just have to test and see.
 
I have a Astro touch up gun and I don't reduce the paint any more than I do
with my full size gun with a larger tip. I have never understood why a
touch up gun can spray with a much smaller tip than a regular gun,
but it does. I can even spray primers with it.
 
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