Okay, here it is a few months down the line and I finally have some progress done and a camera to document it!
I started out adding Silly Putty to my StuH42. Then I shot paint for the second color of a three-color pattern. Then I masked the StuH42 with more Silly Putty and shot the third color. Here are the results:
The StuH42 with all the Silly Putty removed:
I need to add the dots for the ambush scheme on this, and then I'll be able to move on.
Next, I tried to do a freehand airbrush pattern of stripes on my StuG. My airbrush tip wasn't fine enough, nor was my paint and air ratio correct, so I screwed the pooch on this one:
Should be fairly easy to clear up.
Anyway, that's all I have to show for now. It sure felt good to get back to the workbench again. Hopefully I'll be able to make more progress tomorrow. Meanwhile, thanks for looking in, comments are always welcome.