Did this for fun over a few days.
Spray painted it a medium green.
Mixed a green the exact same color as the base in oils, put it in about 8 or 9 different spots on a pallets and tainted each one with a dot of green, or red, or white, or yellow, or orange, or blue or whatever.
Put each of those colors onto the separate metal armor panels.
I used a flat brush to get most of it off just leaving a tint left.
Black oil wash.
Treads are hand painted silver, then a darkish rustish reddish brown color.
I gave that a black wash like the other
then wiped most of it off and some of the red, leaving some of the metal through.
I didn't wana dirty it up