Hey Roy, the Grass is easy to do. i just apply some pva sieve the grass on to it pat it down turn my base to knock off the loose and then repeat the process several times, once im happy i blow it and the grass stands, i also paint the area green, once that is done i spray pigments over it to take the brightness out of the green.
Looks great. If you have any other barrels laying around perhaps doing a dio with some Pz. I & II in France. The crews could be sharing a barrel of beer ;D