Meaner than a junkyard dog!

I apparently had some anger issues as a kid... I destroyed so many of my cars. They somehow didn't get thrown away and I just found a box full of them from years ago. So I think a junkyard diorama is in order. I've been wanting to mess around with "rusting" cars so I think I've got the perfect specimens here.. Anybody have any tips or tricks? Feel free to share your diorama, give me some inspiration.