I think Army Painter would have a fair amount of the percentage on the sprays anyway. I havnt tried looking to see if they are in fact duplicated within the AP spray range as the AP range is a tad easier to get hold of around my parts.
Never tried it. I'll have to pick some up on Sunday when I'm in town. I've got a couple of mucky glazes and washes I've mixed myself that I use ... if it saves me a job mixing it up I'll be happy enough.
"You're a big man, but you're in bad shape. With me, it's a full time job." – Lt. Bromhead to Prince Dabulamanzi before the Battle of Rorke's Drift.
I found a recipe online for making your own ink washes. Tried it and it works pretty much exactly like Devlan Mud. At a fraction of the cost.
Winsor and Newton Acrylic Flow Improver Winsor and Newton Acrylic Matt Medium Deionised Water Acrylic Artists Inks
Mix 1 part of Flow Improver with 9 parts of Water, then mix this 1 part with 1 part of Matt Medium and shake well. It should look like frothy milk. This is a stock solution so you can make plenty of it.
To make your wash take 15ml of the stock solution and add 20 drops of ink (15 drops of Burnt Umber + 5 drops Black comes out near exactly Devlan Mud). Winsor and Newton media and Rowney inks are what I used so I can promise that those work. Other makes will probably do just as well though. And the bonus is you can make any colour wash you want.
The only thing you need to watch out for is that these settle more on standing than the GW stuff, so you need to shake well before use.