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                        Pebbly/Grainy texture when airbrushing w/ MM Acryls from Paasche VL

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                        AJB93
                        • Member since
                          June 2006
                        • From: Waiting for a 1/350 USS Salt Lake City....
                        Pebbly/Grainy texture when airbrushing w/ MM Acryls from Paasche VL
                        Posted by AJB93 on Thursday, June 5, 2008 9:59 PM
                        I'm assuming this has to do either with the paint drying a bit before hitting the model or the paint being a tad to thick. What should I do? Airbrush at closer range, increase the pressure abit, use some thinner, acrylic retarder, some illegal combination of the above? I'm spraying MM acryls, straight from the bottle, at about 15-20 psi. Thanks in advance for any tips.
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                        HawkeyeHobbies
                        • Member since
                          August 2006
                        • From: Neenah, WI
                        Posted by HawkeyeHobbies on Thursday, June 5, 2008 10:17 PM

                        Definitely thin the paint down some...straight from the bottle is good for some paints but not what you are using. Add a few drops of isopropl alcohol.

                        Keep you air pressure 15 or below. Distance should be 6-8 inches away. 

                        Gerald "Hawkeye" Voigt

                        http://hawkeyes-squawkbox.com/

                         

                         

                        "Its not the workbench that makes the model, it is the modeler at the workbench."

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                        bobbaily
                        • Member since
                          November 2003
                        • From: Nashville, TN area
                        Posted by bobbaily on Friday, June 6, 2008 6:09 AM
                        You might want to try some MM Acrylic Thinner-I use MM Acrylics and using their thinner helps alot.  MM Acrylics tend to be thin, so usually just a couple of drops does the tricks.  I don't know if the thinner has a retardant in it-one of the 'resident experts' here may know though.

                        Bob

                         

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                        MikeV
                        • Member since
                          April 2003
                        • From: Hayward, CA
                        Posted by MikeV on Friday, June 6, 2008 9:28 AM
                         HawkeyeHobbies wrote:

                        Definitely thin the paint down some...straight from the bottle is good for some paints but not what you are using. Add a few drops of isopropl alcohol.

                        Keep you air pressure 15 or below. Distance should be 6-8 inches away. 

                        I disagree Gerald.

                        He is using a Paasche VL which is a siphon-feed airbrush and spraying at 15 psi and below on a siphon-feed is a recipe for failure. The Paasche VL is notorious for needing more air pressure to spray reliably and I would not use that airbrush at anything less than 20 psi and problably closer to 30 psi.  

                        Thin your paint 2:1 and try 20-25 psi and see how that works.

                         

                        “Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon
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