I saw one of these that someone had made and really liked the idea, so I decided to try it myself (and I added about six more feet to the length). There's all sorts of safety hazards with this Instructable so please be careful if you decide to make one. Also, I'm pretty sure you're not allowed to wander around train tracks collecting discarded spikes, so please exercise more common sense than I did and, I dunno, maybe buy the spikes from a flea market or something.
If you're diggin' this Instructable, please check out this one
I worked on with a good group of knuckleheads (we built a full-scale vintage WW2-era town and then blew it up all to heck). I sometimes get called on to make film props look vintage and aged and so forth; if anyone has examples of how they make things look worn and beat up I'd love to hear about it (I'm always trying to find new ways to make things look old!!!). Please post links to your Instructables in the comments section. Mucho mucho!