Acrylic weathering products, while being very attractive due to not being hazardous, tend to have a big issue: surface tension. Solvent-based products, washes spread much better, and they do not leave “tide-marks” like water-based products do; therefore I was pretty interested in how Vallejo’s dust washes perform.
In short: very well.
(OK, you can stop reading the review if this is all what you wanted.)
I used the road wheels of an old Panther build I left unfinished (but will finish, I promise) to see how these washes perform on a complex surface. I simply applied them with an overloaded brush, and let them dry. It spread nicely, just like a solvent-based wash. (Perhaps Vallejo used a surfactant.) The results are nice: subtle, dusty look.
The second and third photo shows the difference between treated and untreated road wheels (one of the reason I chose this as a test-bed: to have a control group right next to the treatment group), and the last photo shows the differences between heavy application (1), light application (2, somewhat diluted with water), and nothing (3).
I also tried three consecutive, heavy applications with the following results
It might be a good look for a vehicle in very dusty, dry environment, but probably not the best way to use it the product like this. The best way to use these washes is to form a subtle accumulation of dust in crevices, not flooding the surface with them. As a general rule: using more than one technique with a light touch to achieve a certain look will more likely create a realistic finish than using just one technique with a heavy hand. This means that these washes will not provide a single step solution for creating dusty-looking surfaces, I am afraid.
I also tried the washes on a piece of scenery a Witcher figure will be walking on, to see if they can be used on the groundwork for good effect. (The paint on the resin base is by no means finished; I was just testing some paints on it.) Regardless of the underlying paintwork, I think I can safely say that these washes can add a little more realism to the soil both in tone and in texture -see the above rule.
Overall, these washes are pretty neat; worth checking out.