Weathering pigments are a great way to add, well....weathering, to your models - large or small. There's a plethora available from many manufacturers...and I've never bought a single one. "Why not?", I hear you cry...well, because I'm old enough to come from an ancient time before such things were really a thing, and I had to resort to other methods, and was taught this particular one by an expert modeller friend of mine who used to paint professionally for model companies, do a lot of military dioramas for model magazines, and who currently works for Forgeworld. His tip was simple and highly effective, as well as very cheap. I can pass it on in two words - chalk pastels.
Chalk pastels are available all over the place - from discount book stores to art supply shops and lots in between. You can buy a set of 25 to 48 of them for around £10 or less - and often much less. Don't get confused with oil pastels, however, or you'll get yourself in a real mess! here's a set I picked up from a local supermarket for about £4 or so.
So these square-profile blocks are very much like chalk - as the name suggests - but if you scrape the edge of one with a hobby knife, you get a fine pile of dust that you can apply exactly the same as a weathering powder.
Use a damp brush and the pigment will dissolve in the same way two, meaning you can use them dry or wet to create stains or streaks - exactly like weathering pigments. I've used them to create everything from exhaust streaks to rust and oil stains. You can use white to create fading or colours to create tonal variations too - the advantage of a set of these pastels is you get a huge range of colours, so don't feel limited by the usual greys browns and black.
So these are great, but one of the pains of using them is scraping them each time you want to use them. Now, many of us can agree that Citadel paint pots suck at storing paints in - the design of them makes the paints dry out, the lids can be awkward and it's too easy to knock them over. I've transferred mine over to cheap dropper bottles, which makes them much easier to use. That leaves me with a lot of citadel paint pots. But wait - before carting these to the recycling, there's another use...holding my DIY weathering pigments. It turns out that a standard Citadel paint pot holds one full stick of chalk pastel...nice coincidence! Drying out isn't an issue for dry pigments, and the lids can be made less fiddly with a few hobby blade "adjustments" to them.
Now I'm not going to spend hours scraping chalk pastel sticks into powder, so I need another method...fortunately I have to look no further than my kitchen to my handy pestle and mortar.
Breaking the pastel into smaller pieces to work on helps here, thirds or quarters seem to be fine, and grind to a nice, fine powder. I do this on a sheet of paper so I can simply pour the resulting powder into the citadel pot after grinding. Tapping the pot on the table half way through helps the powder to settle if you're getting close to the top.
Using a stiff make-up brush also helps to dislodge the ground powder and get the last bits out
And that's it! A set of as many weathering pigments as you desire, for a fraction of the cost of "purpose made" commercial ones. Enjoy!
