Sorry for the lack of progress folks. I did manage to get into the garage and finish up these AT Guns though. :)
I scored the bases with a knife before glueing the fully painted figs down and then covered the bases up to the height of the figures feet with drywall spackle.
Next up is a US Armored Recon platoon! :)
Figured out how to edit posts :) Here is a picture of the Didis magic wash and Flow Aid I use for the washing of all my armored vehicles.