Having driven a "show" vehicle regularly, I have done all sorts of stuff to keep the several thousand $ paint job (alone) perfect.
I have learned the following regarding parking lots.
When you park out away from everything, you are a sitting duck. I have had 2 unwanted events occur when parked like so, and 0 the way I do it now.
Now, I park in the least accessible part of the lot. Usually a side lot, or back lot even. Also I will always park the curb if possible, and hug it really tight. Even when there are other cars there, they are usually the workers vehicles, and you will be in and out before they leave. If you frequent the same place, look for the same vehicles that are always there, and park next to them. If nobody is getting in and out, you are protected by their vehicles!
A story for all you "lone parkers"...
One time at Wal-Mart I saw a buggy start at the middle of the lot, and roll, gaining speed straight into the door of a newer Black Mustang. I would rather have a ding to buff out! Have also seen a few near hits of people wandering aimlessly through the bottom of a lot and almost crunch a car out there alone.
As for the rest of it, yes, I am the same. Rubber mats on top of the carpet ones, etc.
DLB