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AFV Painting & Weathering
Answers to questions about the right paint scheme or tips for the right effect.
Hosted by Darren Baker, Matthew Toms
AK primer gone bad?
Chrisk-K
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Maryland, United States
Joined: January 09, 2012
KitMaker: 310 posts
Armorama: 294 posts
Posted: Tuesday, November 25, 2014 - 04:35 AM UTC
When I was spraying the AK primer on my junk model, I noticed that it didn't cover the surface smoothly. After it cured, it shows a ton of mysterious tiny specs as you can see. Is it gone bad?

didgeboy
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Washington, United States
Joined: September 21, 2010
KitMaker: 1,846 posts
Armorama: 1,509 posts
Posted: Tuesday, November 25, 2014 - 05:50 AM UTC
It seems to be separating right? Really runny at times and those specks? I had the same problem recently and was wondering the same thing.
Chrisk-K
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Maryland, United States
Joined: January 09, 2012
KitMaker: 310 posts
Armorama: 294 posts
Posted: Tuesday, November 25, 2014 - 06:02 AM UTC
It doesn't seem to adhere to the surface when it hits it. I sprayed AK's grey primer on a plastic milk jar, it ran like water.
mach1revo
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Florida, United States
Joined: June 08, 2013
KitMaker: 26 posts
Armorama: 5 posts
Posted: Wednesday, November 26, 2014 - 12:45 AM UTC
What psi did you spray at? Typically the acrylics need very light coats at a much lower psi (i spray @ 15-18psi) than solvent based paint. Any higher and they tend to separate and roll off/ bead up.
dvarettoni
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South Carolina, United States
Joined: September 28, 2005
KitMaker: 778 posts
Armorama: 763 posts
Posted: Wednesday, November 26, 2014 - 01:17 AM UTC
I have the same problem and I run my airbrush at 15pis I have noticed that the surfers has to very clean
Dave
blabla
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Niedersachsen, Germany
Joined: December 02, 2006
KitMaker: 147 posts
Armorama: 142 posts
Posted: Wednesday, November 26, 2014 - 01:34 AM UTC
Hello,


had only problems with AK/MIG colours. Solution was Gunze Thinner (The Dark Blue).

Cheers
Chrisk-K
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Maryland, United States
Joined: January 09, 2012
KitMaker: 310 posts
Armorama: 294 posts
Posted: Wednesday, November 26, 2014 - 03:40 AM UTC

Quoted Text

What psi did you spray at? Typically the acrylics need very light coats at a much lower psi (i spray @ 15-18psi) than solvent based paint. Any higher and they tend to separate and roll off/ bead up.


Various psi values. I've been shooting acrylics for 3 years and this is the only time I'm having an issue with them.

BTW, I bought 3 AK primers about 10 months ago and they sprayed beautifully back then.
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