Workbench
Basing
I base all my models using magnetic strip and thin tin. Once cut to the shape and size required, I spray paint it brown mid green, spray glue on and drop a mixture of railroad grass/crushed florist brick. I like my bases clean and simple to fit in any terrain environment.
Mounting
I mount using contact cement which is then sprinkled with more crushed brick.
Painting Can DO Pz III and Pz II
I base coat with Testors Flat Grey. I got this whole new off ebay for US$10.
I use a diluted mixture of yellow, brown and green as dust and dirt on the sides. Finally, I use a black-green diluted wash over the whole model:
So that is my 3 colour paint job which is good at 2 foot visually. At 1 foot I would paint the mufflers rust, black tow cable and the other tools steel/wood as necessary.