Regular dawn dish washing soap, a soft/med bristle brush, and fine steel are a really good start. Also knowing where to look for inspection marks helps too. If you find a broadcast sheet in the seat take some good pictures first since it will probably be brittle from the heat. Evaporust work great to remove rust and bring out inspection marks, but they will usually wash off when rinsing. Buy the biggest memory card you get for your camera and keep it just for the Dart.
BTW, I have a complete 68 Dart dash and you're welcome to anything on it (gauges, switches, etc) free of charge.
