This was my first time using pigments for weathering and I had a ball with them! I did a little basic experimenting so I could get the hang of applying them dry, wet and dry onto a wet surface. Once I got the feel for how they worked I really went to town developing streaks down those slab sided flanks. I used a combination of techniques and three different shades of pigments from the Warpigs "earth" set - Natural Umber, Natural Sienna and either Light Sienna or Natural Yellow, can't remember which right now (I'm at the office [;)])
Using a wide brush I lightly wetted one section at a time with turpenoid, tipped the tank about halfway on it's side supported by a big bottle cap and a plate edge, then dipped a dry, wide brush into some pigment then gently stroked the brush in downward strokes along the sides gently brushing the pigments in straight lines down the flanks. I continued with that process all they way accross, then repeated for the other side. This gave it the overall basic downward streaking I was looking for as a base, with heavier emphasis on the upper parts.
Using a smaller round brush with a fairly precise point at the end I dipped it into a mix of some darker pigments in a beer bottle cap with just a little turpenoid and more or less painted the darker streaks individually down the sides.
Used more dry pigments and dabbed them all over the tank in random batches using three different colors of pigments. Using a dry short, stiff brush I dabbed it all over the tank to create a good general effect of dryed dirt and mud all over.
With dry pigments and a big brush, I flicked pigments down the sides starting at the trackes on top. Pigment then slid down the sides and stopped along the tops of all the raised surfaces. Using a small, round brush I wicked just a little turpenoid in the areas where the pigments had piled up so the "dirt" would stay and give the 3 dimensional effect of having loose dirt piling up.
Using a mix of turpenoid and pigments I grubbied up the lower part of the tank, especially on the rubber boots at the bottom.
Wetted spots like the drive sprockets with a little turpenoid, dipped a big soft brush in the pigments then flicked the brush at the sprockets without actually touching them. The pigments fleck off just right and look like mud spatters after they hit the wetted sprockets.
I also wicked turpenoid along all the seams and raised detail, again to simulate streaking of water, oil etc. I also just flicked some clean turpenoid in various areas to simulate various stains etc.
I wetted up the chain pretty good and slathered it up with a dry brush dipped in the pigments.
For a first attempt using pigments I am pleased with the results and have a much better understanding of the different ways to apply them and the effect they create. What do you guys think?