Hey Arthur,
Nice work on this Wespe, your weathering job is progressing well, the subtleness is appreciated.
As for the tracks, they were usually a light brown colour due to the high levels on Manganese in them and were prone to rust in the recessed areas.
Also regarding the tracks, in the picture of the rear of the vehicle, the inward slant of the tracks seems to be inaccurate, if the track were to bend like this, I expect it would be thrown.
Also, the track sag should be consistent while it seems that only one part of the track is sagging in the first picture.
The spare tracks at the front of the vehicle should be more rusted than the ones in use as they would not be in contact with the ground.
Finally, the victory rings look slightly thick and out of scale, my reference photos show them as resembling a typical paintbrush thickness.
Keep up the nice work,
Andrew