You can substitute acrylics for oils for all of this, put its decidedly more difficult to pull off. With the oils I have minutes and even hours to work with the paint to get it right, with acrylics I better get it right the first time. I see that Ammo by Mig does make an acrylic thinner maybe I'll try experimenting with that.
In the meantime, I have finished the fading on the U304 (f)s. I used the Abteilung oil paints on two of them and Oilbrushers on the third. I like the Abteilung oils the only disadvantage I see is using tubes which always wastes paint. The Oilbrushers are just a bit easier to deal with in this regard since I can go straight from the bottle to the surface with the build in brush. Once the fading was finished though you can't tell the difference so which one you decide to use really comes down to personal choice.
Fading in progress:
|This is how it starts out, just a few streaks of paint.|
|Starting the blending, the key to be successful here is very little thinner on the brush.|
|Kind of messy yet, but I'll get it cleaned up.|
A few days after I did the initial work I was able to, more or less, finish off this portion of the paint work. I did a fade on the mostly upper surfaces and I darkened the green in some other areas. What I really discovered is that, at least for me, that its best to keep you oil paint dabs very small and you don't need to use any thinner at all, or very, very small quantities. It didn't take much thinner to wipe away my work. Which means I might consider sealing these again after I do the chipping.