So How Does A Car Become Radioactive, Anyway?

Recently, Russian custom officials prevented 300 Japanese cars from entering the country because they were believed to be irradiated from the Fukishima nuclear power plant disaster. This made me wonder two things: first, can I get an awesome deal on a slightly radioactive FR-S, and second, how does a car actually… » 7/20/12 4:20pm 7/20/12 4:20pm