Here's the progress on the Hetzer. As can be seen, major assembly is mostly done, and I've applied the first basecoat of Dark Yellow. In the background can be seen one of the camouflage schemes, a pattern often referred to as "Ambush." It consisted of alternating bands of Dark Yellow, Red-brown and Green, with dots of the other two colors on each segment (thus, the dark yellow segments would have dots of red-brown and green). This scheme was factory applied, and while it is very popular among modelers and wargamers, it was also fairly short lived, only applied during the Autumn of 1944, per all of my references.
As can be seen, the tracks and suspension have been fully assembled and "primed" black. I normally do not prime the model (or, if I do -- such as if the plastic is very dissimilar from the final vehicle color -- I usually use a neutral gray tone), tracks require a great deal of weathering. What I will do is paint and weather the tracks, then hand paint the wheels.