Posted: Thursday, February 15, 2007 - 01:09 AM UTC
Hey Tony: welcome to AFV modelling!
I think the undercarriage would have minimal rust -- troops in the field kept high levels of maintenance on their vehicles since their effectiveness and often survivabliltiy depended on it.
If I were modelling the Krupp Protze, i'd show the entire underside to be coated in a layer of dust.