I ended up mixing some paint to try and match the Tamiya Luftwaffe Light Green and then began dry-brushing it onto the M41s.
Once that was done I started to paint the stowage and other bits and bobs on the vehicles:
And then gave them a wash
I added the tracks in the last two pics to try and get a sense of how the tanks are looking. I'm pretty happy thus far - but have a few more things to do before they can count as finished.