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Need advice spraying liquid mask

Old 05-22-2024, 12:15 PM
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Default Need advice spraying liquid mask

Hello,

Getting back into RC and painting after a long absence.

I have an HVLP gun that I would like to spray the liquid mask with. Do you thin the LM at all? What pressure do you use with an HVLP? Needle size?

How many just use a regular airbrush to spray the LM with ?

Any advice is appreciated!

Cheers,

John
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Old 05-22-2024, 08:35 PM
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So far I have only used an HVLP gun with a 2.0 tip, no thinning and spray 4 coats for large 5th scale bodies. I have seen these as cheap as $25 on eBay.

I'm not not sure if a 1.5 or 1.0 tip will work. Maybe with some thinning is required. I have never heard of anyone using an airbrush to apply LM. IMO, it would be a wasted of time with the thinning and multiple coats. I would rather apply the LM with a foam brush.
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Old 05-22-2024, 10:09 PM
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Bittydesign mask with a 1.5 HVLP directly from the bottle around 35psi on my compressor. I donít use the regulator for my airbrush with the HVLP gun. Minimum 3 coats because Iíve had miserable time peeling mask in the past when too thin.

FWIW, there are tutorials that use an airbrush at 50psi. Iím sure they had to thin it even at 50psi.
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Old 05-25-2024, 06:50 AM
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If you are only painting 1 or 2 bodies at a time, you might want to brush the mask on. Over the years I have painted thousands of bodies and always have used a 1 inch paint brush to apply liquid mask. It allowed me to regulate how much mask I was applying and there was little to no waste. I would apply 4 or 5 thin coats, drying them with a hair dryer. Good Luck.
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Old 06-22-2024, 03:45 AM
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To spray a liquid mask with an HVLP gun, thin it with some water or the recommended thinner until it's like milk. Use a needle size of 1.0-1.3 mm and set the pressure between 15-30 PSI.
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Old 07-02-2024, 01:00 PM
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Originally Posted by justicepool
Hello,

Getting back into RC and painting after a long absence.

I have an HVLP gun that I would like to spray the liquid mask with. Do you thin the LM at all? What pressure do you use with an HVLP? Needle size?

How many just use a regular airbrush to spray the LM with ?

Any advice is appreciated!

Cheers,

John
I was in the exact same boat last week. Bought the infamous purple HVLP gun from Harbor Freight for $16. I don't know what size the tip is, however it was a bit of a pain to get to spay cleanly. I may also have received a defective gun as the trigger is SUPER sticky - and I can't seem to remove the needle.

I didn't thin the Bitty liquid mask at all, but thinner would have been better for sure. I can't see it working well with an airbrush .5mm or smaller at all. Probably not worth the time.
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