I don't bother weathering but I did want them dirtied up a little.I think about three lightening shades of dirt brown with three shades of static-grass finished the MDF bases which were coated with pr4e-mixed putty.
My final touches were drilling and fixing the two main aerials. My photos were taken before fixing the roof mounted MGs. The real purpose of these models being based is for storage and transport. The turrets are fixed to the chassis but they do swivel. My bases are longer to the model's rear which allows a little sculpting in the putty to replicate tank tracks but perhaps more importantly, they cover the length or the gun barrel when the turret is turned to the rear. When turned to the rear, most of the barrel runs the length of the chassis and provides for the least overhang. This protects the model when in their travel boxes.