True Earth Dust Wash. This stuff is great and so easy to use. A couple of drops in a paint well and then half a dozen drops of water. Mix it up and apply with a brush. The water dries and leaves a dust effect that actually looks like dust and looks in scale. You can apply more coats if you want it heavier. Solvent free, smell free and not aggressive on painted surfaces.
I don't know how long this has been around but I have had it for about a year and love the results.
Available in several different versions : Dust, Desert. Mud, sand etc.
I brought it directly from
They have many other products as well.
Here is a link to the Dust Wash page which has information and a short video tutorial.
What a find. The last time I used enamel based washes to weather a model I decided that would be the last time. I just can't cope with the fumes. Since then I've been hoping to find an alternative. I tried using Vallejo paints and so forth with unsatisfying results. These look like just the thing I need.