Missed a lot of steps but after
Vallejo Olive drab Surface Primer
3 coats of Vallejo Russian Green
Gloss varnish
Hairspray
White wash
I ended up with - A big white tank.
But after attacking it with a big wet brush and some kitchen roll I've ended up with- A big mess.
I've only ever tried the hairspray trick on a test 1/76 scale stug and I'm quite pleased with the result.
Now to mix up some mud.
