Here is the Games Workshop Baneblade kit (not the Forge World Baneblade kit which I don't think is for sale anymore) ready for painting.
Then I sprayed the entire model dark green.
Then, after it was dry, I drybrushed the entire tank with catachan green. Note that the painter's tape is still on the model.
Then, after the model was dry, I remobed all of the painter's tape. As you can see, the taping has allowed me a very effective 2 tone camo scheme. The tracks are also ready to drybrush gray or silver.
Here's the Baneblade next to a Destroyer Tank Hunter I painted in a similar way.