by kittyfritters » Mon Aug 16, 2010 12:51 pm
If you have several coats of white glue/water on the tissue you are ready to paint. White glue and water is heavy so I assume that you are making a static model. You can use acrylics to paint the model. There is a load of water in the acrylics so you can expect sag, but the covering will tighten right back up when dry.
The whole point of using these products is to avoid the odor and toxicity of dope when fixing the tissue after shrinking with water or alcohol. Krylon Crystal Clear (#1303, gloss or #1311, matte) and the Future floor finish are used to fix the tissue in place of dope or the white glue/water mixture. With the Krylon, mist on two or three light coats from about 15 inches away. The tissue will sag briefly, after each coat, but tighten back up in a few minutes. You can paint with acrylics over Krylon. You can paint acrylics over dope. You cannot paint with dope over acrylics. Krylon is water resistant, not waterproof, so you will have to wait until the dew lifts in the morning before flying.
Krylon is also used for fixing and de-glossing decals or "tissuecals". It is an acrylic fixative meant for artwork so just spray on the decals as per the directions on the can.
Future floor finish is also used to fix the tissue in place of dope. It is also an acrylic fixative, but since it is meant to protect floors it is tougher than Krylon and very nearly as waterproof as dope. It must be handled carefully to avoid adding too much weight. The people who I have seen use it most successfully have been thinning it with rubbing alcohol and spraying it on with an open mix air brush. You can paint over it with acrylic paints.
If you are building a seaplane or flying boat that will actually be operated off water, use dope.
Does that clear it up?