I airbrush with acrylic inks and acrylic paints. I shrink with rubbing alcohol, 70%, (30% water). When it is dry I
mist twice with Krylon #1305 artist's fixative for a glossy finish or #1311 for a matt finish. After that is dry I do the airbrushing. The Krylon is water resistant, not waterproof, which creates an interesting situation. Acrylics, thinned for airbrushing, carry a heavy load of water. When you airbrush the tissue will sag but when dry will become tight again. This means that is you are using multiple colors you have to let one color dry completely, usually over night, before masking and applying the next color. If the first color is not absolutely dry you risk paint collecting in any sag in the tissue when you apply the next color creating painted on wrinkles.
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I learned this the hard way doing the Typhoon in the picture. I mask with Frog tape for delicate surfaces.
Hope this helps.
KF
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