does this only include what the body looks like on the bit? or can it have to do with chassis as well. I mean like if someone took the time to make their bit look all rusted out, wrecked, and beat down, like a real car of 20 years of abuse. wheels that were glued to the axles off center so the car bobs and bounces when driving.

just something to take into consideration. I just think it would be neat to take an old beat up bit and make it look and drive even worse. A few more ideas I've got floating around..... Dragging muffler, roof caved in a lil, and feild of dreams non drivable car. Basically all "model ageing".