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seeking help for airbrushing problem

February 13 2018 at 9:58 AM

Jay  (Login jwhangen)
HyperScale Forums
from IP address 64.251.59.82

I’ve been having a problem with airbrushing that I’ve never had before – been getting “wrinkles” in the paint. It’s not a rough orange-peel effect, it’s more where the paint wrinkles in random places.

I’m using Mr Color paint (flat gray-type color) thinned with Mr Color thinner – I’m using my usual ratios, so the paint is like milk. I airbrush in my basement, and it’s cooler down there than usual, could that be the problem? It’s driving me crazy. The wrinkles appear almost as soon as the paint has been sprayed onto the plastic. Am I putting it on too thick maybe, or too thin??

 
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AuthorReply

Whitey
(Login AWF8251)
HyperScale Forums
72.9.14.123

Sounds More like a Surface prob than an Airbrush prob

February 13 2018, 10:29 AM 

Make sure you're shooting to a cleaned surface (91% alcohol works well).

Try painting onto a test piece first to verify.

 
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Jay
(Login jwhangen)
HyperScale Forums
64.251.59.82

thank you

February 13 2018, 10:41 AM 

I did wash the part in soap and water, I'll try your method too. The problem looks like this

http://www.rocketryforum.com/attachment.php?attachmentid=77263&stc=1&thumb=1&d=1511661553

 
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David Nickels
(Login djnick66)
HyperScale Forums
65.33.79.222

Could be a few things

February 13 2018, 12:27 PM 

Are you spraying over a primer or bare plastic? A primer would probably solve this

If bare plastic, it could have a surface contaminant - finger oils, mold release oils, or, rarely, a big , greasy spot, molded into the plastic.

You mention Mr. Color paints and M r. Color thinner. Are you useing their regular thinner or M r. Levelling Thinner. You should be using Mr. Levelling Thinner which has a retarder and flow agent.


 
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Mike Lobo
(Login theapacolypse)
HyperScale Forums
47.136.33.47

I ran into this when I tried to spray a fast drying paint over a slow dryer(nt)

February 13 2018, 5:24 PM 

My girl - well she's kind of an ugly girl. But,that's O.K. I like ugly girls. Because pretty girls can do anything, but ugly girls have to do everything.
-John Birks "Dizzy" Gillespie
[linked image]

 
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George Campbell
(Login blueangelmodeler)
HyperScale Forums
68.109.111.103

We used t buy Wrinkle-finish Paint back in the late 70's for use on

February 13 2018, 11:16 AM 

telescopes. Could it be something in the paint itself ? I do not know, but we used wrinkle paint for several things. Good luck, George

 
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Frank
(Login floch3)
HyperScale Forums
65.78.89.11

Surface cleanlyness is very important. I start be soaking all the

February 13 2018, 11:16 AM 

plastic parts in water with dishwasher detergent added, then rinsed and dried. When ready to paint, I clean the plastic with Terpenol, followed by a wipe with Alcohol, then a tack cloth. During this period of time I'm wearing white cotton gloves to keep my body fluids off the plastic. And yes -- just prior to spraying I use the Airbrush at high pressure to blow off and recently added dust.

Frank
[linked image]

 
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Phil Palmer
(Login pjpalmer)
HyperScale Forums
104.9.34.174

Wavy paint

February 13 2018, 11:55 AM 

Sounds like you're trying to apply way too much paint in one pass. Air flow from your AB is forming miniature waves in the wet paint. High air pressure and improperly thinned paint compound the problem. Mr. Color requires higher thinning ratios than most other paint. Try Mr. Color Leveling thinner 70/30. Cooler temperatures will increase the apparent viscosity of the paint. Especially if its not properly thinned to start with. If you are getting cob webs as you spray Mr. Color your paint is way too thick.

 
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