salt on my car

here in the cold cold north there is frequently salt on the road. which equals salt on my car. which is not necessarily a happy thing. but this evening, as i was pumping hard earned cash into my gas tank, i noticed some odd prints in the salt on one of my car doors. at first, i thought it might have been a coat pocket that brushed past. then i looked closer and remembered that i had bumped the door shut with my behind earlier in the day. the print was so clear you could see the stripes from my corduroy pants!