Finally getting around to “real” efforts at weathering this week and I used Jeff Wilson’s formula (10% paint + 90% alcohol thinner). My mix is water-based Polly Scale Concrete and 91% iso alcohol. I used it on a test piece of brick-molded wall scrap (styrene), but found it dried very quickly and was harder to remove with a white vinyl (drafting) eraser. In fact, the test piece looks like the 3 Stooges were the masons on that job!
Should I use 70% alcohol instead? Should I wipe the wash before it dries,instead of erasing the overage on the brick face?
Actually, Wilson’s book mentions water, but states that the alcohol thinner is preferred, as water tends to bead up on the model surface. As 70% alcohol has a greater water component, my question as to using that instead of 91% alcohol remains. I tried the water-and-paint recipe alternative, but appearance of the “mortar” is much less apparent.
It’s the easiest and fastest I’ve yet tried. The website states that you can’t mess it up. Put it on, let it dry, wipe it off. And I’ll be darned, it actually works that way.
