Very nice build!
Thanks for sharing the photos!
Two things:
On the Revell website, the Kanonenjagdpanzer is no longer shown. Therefore, the only ones available are via marktplaats.nl, e-bay and alike. I can recognize your remarks about sink holes and sanding. I just retrieved a raketenjagdpanzer via marktplaats.nl and was immediately confronted with the typical Revell characteristics: sink holes and some weak details. Also, the plastic needs extensive cleaning before accepting any form of paint.
The second thing is that this is a so called NATO cold war period vehicle. Thus being a ' victim' of extensive maintenance and very little 'combat-like' use during manouvres. Therefore, these vehicles most of the time looked spic and span! They were just driven around from parking lot to trains or trucks to be transported to the shooting ranges. In technical shooting training, movement was not as much as one may think! ( Many crew felt therefore very frustrated, hanging around quite some time, waiting for their turn!) Field excersices offered more chanches to realistic use, but, here, the limitations of civil envirments and (environmental) laws would also not create a big change in look.
Rust would never been seen on this extend! Any unit commander would face hard times if even one of his vehcles would show up like this!
And, as stated above, even after a field exercise, which were held, for these vehicles, always in north western Europe, and seldom longer than three weeks, a crew would not turn up from the woods with a rusty look like you depicted.
Also, both Kanonenjagdpanzer or Raketenjagdpanzer never fired a shot in anger. They were kept in top state, waiting for East Block trooops, which fortunately never showed up.
Never mind, we are modellers, aren't we!
The track sag is not normal on these vehicles. Like all Leopard based vehicles, track tension was in such a way that they looked straight! Both jagdpanzertypes came from the same design office and showed same features.
But again: never mind, we are..........................
I hope you accept my comments. They were given with good intentions.