Re: ertl AT-AT diorama WIP
I couldn't resist putting up a couple of teaser photos... the AT-ATs are basically done and I'm about to start on the rest of the diorama!
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Once I had finished airbrushing with acrylic I laid down several filters by grinding up chalk pastels and mixing them with water to create a thinned down solution. I used some soap to break the surface tension and then carefully brushed the wash on, adding water to thin down areas and dropping neat colour onto the wet surface in other areas to help it all run together, creating streaks and blemishes.
I'm a watercolourist by nature, so wanted to be able to do this on my models. The secret is to use plenty of water, and if you are covering a large flat piece you want to hold the model at about 30 degrees from horizontal, so when you apply the watery solution it naturally flows all in one direction. You start from the top and work your way to the bottom in horizontal strokes. You will end up with a little reservoir of paint at the bottom where it all collects and all you do then is get a dry brush or cotton swab (Q-tip) to soak up the accumulated water. This way you avoid weird shapes forming when it dries. Remember to leave the model at this angle until dry. It sounds complicated but it is a very well-known watercolour painting technique.
I have tried this with watercolour but have found that because watercolour is so finely ground it is difficult to control. Because pastel scrapings are a little thicker, they tend to 'stay' better and you can move the particles around with your brush more effectively.
This technique is a bit like the promodeler's weathering washes and luckily, the pastel adheres without the need for matte varnish. Darker colours come off slightly, but if care is taken, this is not a problem. If I made any errors I could remove the solution with a damp cotton bud, or more interestingly by using a pencil eraser once the area is dry. The eraser can make some really crisp edges as well as fading out, or toning down areas.
The amount of control I gained from doing this was staggering and as a plus point, the pastel also filled in panel lines perfectly. Instead of using black pastel I mixed some cold blues and browns together. This gave some variation and stopped the black from killing the model. All in all this technique combines washes, colour filters and paint effects all in one, and can be carefully built up.
This will be my technique going forward... it is simple, but is very intuitive! It works better than using watercolour as it can be lifted off easily, and the coarse pastel grains can be moved around easier.
Now, on with the base, figures and gun placements!