nssd70m2
Superintendent
Norfolk Southern Piedmont Division
Posts: 159
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Post by nssd70m2 on Mar 15, 2009 18:08:20 GMT -5
So today I was finishing up my C40-9W...i started painting and it just slid off the side of the engine...i was guessing i put to much thinner in it. So i poured another can with less thinner and it was grainy. I'm guessing I am just not finding the perfect ratio right?
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nssd70m2
Superintendent
Norfolk Southern Piedmont Division
Posts: 159
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Post by nssd70m2 on Mar 15, 2009 19:57:04 GMT -5
Enamel. The reason I asked is the other side went on perfectly without and problems...
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Post by icghogger on Mar 16, 2009 9:59:03 GMT -5
A "grainy" finish can also be caused by the paint drying before reaching the surface. Too much air pressure and/or too far back from the surface will do it almost every time. Robert gave some sage advice: always stir, never shake, your paint to mix it.
When spraying, enamels handle best at 15-20psi, while acrylics work best between 20-25psi. Experiment with some scrap plastic, adjusting your pattern for good coverage and (this is very important) watch your paint/thinner ratios. Always start with those recommended by the manufacturer and use medicine droppers to accurately measure your mix. Keep notes of your mixes when blending colors.
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nssd70m2
Superintendent
Norfolk Southern Piedmont Division
Posts: 159
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Post by nssd70m2 on Mar 16, 2009 16:18:19 GMT -5
Thanks everyone...I'm still new to airbrushing  I finally got it to spray right. |
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I finally got it to spray right. 