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Air brush paint thinner

M

Marty Olsen

Joined
Jan 8, 2024
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What is a rule of thumb when it comes to thinning air brush paint? At times, I've not added enough thinner and the brush clogs easily. Other times I've used to much thinner and the paint doesn't cover well or runs. My current build is the Grand Banks Dory and I want to paint the inside of the hull before I build the sole and install the thwarts.
Thanks,
Marty
 
Hi Marty, there was some discussion on thinners and ratios in a thread a year or so ago. I've attached a post mentioning the method/s I use. Read back etc and there’s some good info. from other SOS members. Hope this helps.

How do you thin Acrylic paint so that it can be used in an airbrush

I also only use vallejo model air, a little goes a long way! I find some colours are more prone to blockages than others so now always add a few drops of flow improver (but from reading the above think I'll try thinners next). Instead of mixing flow/improver/thinners with the paint in the...
shipsofscale.com
 
Depending on your selection of paint, add enough drops to bring the viscosity you notice while stirring to be about that of milk. Then test spray and see what you think. Paint that comes from the hobby bottles (acrylics) can be a little thick. Paint that comes from Army Painter may already be thin enough. Lacquer can need only a few drops of thinner, while enamel may need to be 50-50. You have to experiment.
 
As Phil mentioned above.
The important part there is to TEST SPRAY on something with a similar finish as to what you want to paint and see how it performs.
What I would do is mix the paint and thinner and see how it sticks to the side of the paint container if I draw some up with a piece of scrap. You want most of it to drip down leaving a thin trail mixture. If it stays in place as a bit drop or leaves a very opaque line, it's too thick.
 
All depends on the actual paint being used. Tamiya Acryllic, 99% of users use something called isopropyl alcohol.. 91%.. And yes it can take multiple coats to get things right. Its just life..

and as far as ratios.. ive seen some master level plane builders mixing tamiya acrylics .5ml paint to 10ml of ISO.
 
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