Dry brushing has quickly become my favorite method for touching up the internal frame of Master and Perfect Grade kits. It's an easy and cheap way to spruce up your model.

The only equipment you need for this method is stiff bristled brush, some paint, and paper whose color contrasts with the paint you're using. I like to use an old toothbrush and save myself the trouble of buying a brush just for this purpose.

The entire process is quite simple,

1. Apply a little bit of paint to the end of your brush. You don't want to saturate the brush.

2. Lightly brush the paper until only a small amount of paint transfers. You only want to apply light amounts of paint to the kit and this step will help prevent you from over-saturating your surface. A contrasting color of paper helps you better see the paint (i.e. white paint on white paper = hard to see).

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3. Brush the plastic in light steps and repeat steps one and two until you achieve the desired amount of detail. Personally, I like to do a few light coats and avoid the risk of applying too much paint all at once. How much paint you apply is entirely up to you and the effect you're trying to achieve.

Here's an example of a piece after some dry brushing and a dull coat to protect it...

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The one on the left has a pass or two more of paint.

It looks even better if you apply some touch ups beforehand...

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Dry brushing, it's awesome!