Had to do some more "styrene strip to wood" conversion, so I took a few photos. The photos aren't all that great, so instead of doing a seperate tutorial, I'll do it here. This technique is relatively well known, and works nicely to represent wood. My apologies for the lack of detail in the photos.
First, take the styrene and scrape it with a fine tooth razor knife. Mostly along the length, but at various angles too, and even some "back and forth" to rough things up. Probably best to do too much instead of not enough - don't want any untouched spots because they will definitely be noticable after painting.
[
attachment=21775]
Next, put on the paint. I used gray, mid-brown, and slightly dark brown craft paint. Thin it just a tad with water, just a bit, definitely not a wash, just enough thinning to make the paint flow. Slop the paint on, alternating the brush dips in the three colors, blend them together on the plastic, but you also want variations in the colors too. It's okay to have just the gray, and just the light brown for stretches. Don't want anything uniform.
[
attachment=21774]
After that dries, next comes the wash. I used a black wash and a brown wash, thinned with water and alcohol. Start putting the wash on, sometimes dipping the brush in the black, sometimes in the brown, but mostly the black. It helps to keep a bowl of water handy, just in case the wash is too strong, dip the brush in the water and spread the already applied wash a bit thinner on the styrene. It is okay o be sloppy here, but keep in mind that the entire point is to have the black wash go into the grooves that we created with the razor knife.
[
attachment=21773]
Now let that dry, then comes dry-brushing. Use some gray, dip a soft brush in, twirl it around with the aim of getting the paint into the inside of the brush. Then using a piece of paper and a cloth, take most of the paint off the brush. Then gently brush over the styrene, what we want here is the paint to go only on the raised portions of the "wood", leaving the black in the grooves. This is one technique that takes practice, but is hugely worth it, and not just for making fake wood. Really and truly, everything on a layout should be dry-brushed with off-white or some other light color. The point is to bring out the details. In combination with the dark wash in the low spots, and the dry-brushing on the high spots, things just look so "wow!". I am definitely not an expert at the technique, and it does take patience, but again, the results are worth it.
[
attachment=21772]
And the finished product. Could have done better on the dry-brushing, but from three feet, it is acceptable.
[
attachment=21771]