Paint Brushes ??? - Model Building Questions and Answers

Hello Pierre

Link to Cohwa

This thread and your post interests me a lot, are you able to share any tips?

For various reasons I have not been able to use my airbrush since the summer but the need to build is stronger than ever, in addition, the range of colors is not what it has been so I have bought a lot of Vallejo colors, read, watched Youtube, tested and tested again and a brief summary of the status today is that I'm starting to get a picture, a feeling for how to do and what materials are needed, the visits to the hobby shop were a bit like switching from 110 to 230 volts. Everything is new in the painting dep.

wetpalette, great so that you have some wet paint left to improve with hours later. Paint shaker, indispensable because the colors become absolutely wonderful by 20 seconds of shaking. Stainless steel balls to put in the paint cans. Vallejo primer, these are polyurethane based and much more durable than the colors, a thin layer is enough, these primers are available in colors which is good as the colors are a little transparent which in turn gives the opportunity to pre shade. Vallejo paint and clear coat. Vallejo clear coat polyurethane, these are just like the primer more durable. Vallejo airbrush thinner.

now, some parts are in soaking in the bath as the clearcoat could not be thinned with water, which was not visible until it dried, test test and test again ...

So to what was most difficult to understand without Youtube,

you do not brush out the color like Humbrol but rather apply quite fluidly with the brush so the color levels out and it dries quickly.
The brush is not as important as you might think, not like painting whit enamels.

There are more videos whit handpainting(not brush) gunpla’s(WHAT is that ??) than 1/25 cars on Youtube.

Next up for my training is a one colour tank model kit.

Yes, acrylics are fragile but it’s better after a few weeks drying and as always, if you want to remove the paint, it sit rockhard.

Latex paint that is dried on your brush will soften. You will need to use hot water, soap and patience. Prepare soapy water and pour into a clean container. Dip the brush into the mixture, working the soap through the brush bristles. Now place the brush back into the hot/warm water for about 20 minutes. Remove the brush, and using a stiff nylon bristle brush gently rub the filament following the flow of the bristles. Follow with a clear water rinse. Repeat the process if necessary.

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For stubborn water-base paints, try mineral spirits or lacquer thinner, followed by warm soapy water and a clean water rinse. It may take 2 or 3 times of repeating the above steps but the paint will eventually break and wash away. Be sure to dry the brush completely.

The brush is not ruined. You need to follow this procedure to bring the brush back to its original finish. First, be sure the brush is completely clean and totally dry. The water from the latex paint and from washing the brush will have leeched the natural oils out of the bristles of the brush.

To bring the brush back to its original softness, use raw linseed oil which can be found at many paint dealers. Put a dime-size drop of the linseed oil in the palm of your hand and work it into the bristles. You may need to repeat the application of linseed oil several times to completely repair the brush. Once soft, comb out the brush, place it in a plastic bag or the packaging it came in to store it.

Do not use a wire brush on a paint brush. While it will help remove the dried paint from the tips of the bristle, it can damage the filament / bristle. Instead, use a brush comb to clean the paint from the inside of the brush, which will increase the life of the brush. To get the outside of the brush clean try using a stiff nylon bristle brush. This will be less destructive on the ends of the filaments.

Natural bristle brushes are made from natural fibers like our hair. And, like our hair, natural bristles absorb water resulting in a soft and floppy brush that won’t paint very well. Also, rough surfaces will quickly wear out a natural bristle brush. So, if you’re using a water-based or latex coating or painting a large, rough surface, choose a synthetic brush (like a nylon or nylon/poly brush) instead. Synthetic filaments retain their stiffness and body with all types of finishes.

Professional painters often prefer a 100% nylon brush for painting interiors with latex (water-based) enamels. However, a 100% nylon brush reacts to heat and humidity by getting softer and harder to use.

Polyester adds stiffness retention to the brush and helps limit the reaction to heat and humidity, so nylon/poly bends are ideal for exteriors as well as interiors. Polyester or nylon/poly blend brushes work with all types of paints and stains and are considered “all purpose” brushes.

Both the 100% nylon and nylon/poly blends allow paint to flow smoothly, thus, the choice comes down to the environment. If your climate has high heat and humidity at the time you will be painting, use the poly/nylon blend. If not, select the brush you prefer.

You should have no problem getting paint to hold over stain. Be sure that the surfaces to paint are clean, that the stain is totally dry and that there are no loose chips on the surface. Prime with a pigmented stain sealer to prevent “flashes” or “hotspots” coming through the paint. Then, choose a Bestt Liebco® brush for high-quality results and a smooth finish.

Once the temperature drops below about 55 degrees Fahrenheit, paint becomes a little harder to work with. It is also easier to get sags in paint because of the slower dry times. Temperatures for latex and oil paints differ, as do stains and paints. Please read the label on the can of finish and follow the manufacturers’ recommendations.

“Cutting in” is a process of applying paint at all corners where ceilings meet walls or where walls intersect. Also, paint is applied next to all molding, trim, and baseboards. Cutting in is easy without painters tape if you use a high-quality paint brush and follow these simple steps below. However, if you are not comfortable cutting in with a brush, you can always use special painters tape to ensure you get a straight line.

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1. Fully load the brush with paint.
2. Place the brush parallel to the area to be cut, push the bristles against the surface and let the brush open up into a semi oval. Then move it into the line you are cutting. Follow the line until the line of paint begins to break up. Repeat.