You got to admit, I bring intrest to anything (except parties, if the gathering is not with my family, I'll leave the country untill the party is over) I have always been a deep thinker, and if you or anyone else shows me a model or a vignette, I'll put a story so good down (eather on paper or in words) that the person(s) will want to attach to their model/vignette.
Now, I have an unfinnished Revell B-17, which I got from the Mighty 8th airforce museum in South Georgia, which I hope to continue when the disaster area I call a workbench is clean(er) yet I already have a beleavable story for the bomber to use in a diorama. I (admittedly, with no plan) started grinding the plastic thin almost everywhere on the bomber (even taking the whole rear door next to the waist gunners off) and modeled so many bullet and shrapnel holes, that a real B-17 wouldn't have been able to fly. The story I put with it is along the lines of the flight was ambushed over the English Channel on the return home, and the bomber (name still pending) dispite being shot to pieces, remained flying and the crew kept fighting, untill alied Spitfires chased the agressors off.
With the critical state of the bomber (1 engine on fire, and the other 3 froze-up from bullets laged in them) the only hope was to glide back to England. They made it, but the bomber came down in a farmer's field, plowing into a haystack.
I got sort of an idea for the ill-fitting parts of the Chevy Nomad, How about modeling it as a "crashed" car?
It should be simple, peeling paint, rust, and disrepair was covered back in the November, 2007 issue of FSM (Karl Logan was the outhor) and, if you want them, dents and crumpled fenders can come curtesy of a heat-gun (be careful not to burn the plastic) or a hair-dryer.( Admittedly, I plan to do the same thing with my '49 Mercury, as mentioned before. It's just a sugestion)
[ Normally, if I get a kit with problems like you are mentioning, I just beat it up, like I'm doing with my current project, a re-release of Revell's SBD Dauntless. Copyright date, 1960 Flash and ill-fitting parts are for everything]
For the railcars I planned to do, I was going to do a Rail Yard Models craftsman kit ( more than likely the KELX X-79) but there was a change in plans. I was looking through my stash of kits, and found an old AMT/Eartl Korean War F-7 fighter (I can't remember the name) I will get started on it as soon as the Dauntless is done ( Just some extreme wethering, and I'll place it on the bottom of a model sea)
If you want to look, at the railcar kits offered, here's the link:
www.railyardmodels.com
If anything else, I still got some old Athern Made in the USA lits to build (admittedly, they will take less than 5 min. to assemble, but I will probably build them and include them, since the subject is Made in the USA)