Find a nice shady spot and wash the car with Comet in the green can. The can that says won't scratch delicate surfaces. Use a terry cloth rag, sprinkle the comet on the rag and use a circular motion on a 2 or 3 foot square area. Wash the chrome, rubber, glass and paint and rinse thoroughly as you go.
Once done washing twice, add a half cup of kerosene to 3 gallons of warm water and rinse the car with it. Wipe it down thoroughly with a soft dry terry cloth towel.
It will look like someone spent hours polishing and buffing the car. This whole process should take you and hour or two at the most. Just don't put the Comet directly on the paint. Sprinkle it on the rag.
Learned this over 3 decades ago from an old timer. Been washing my '68 like this for over a decade and it still looks amazing. Don't use it on dark colored cars.
Leave the rust spots and such alone. It's called patina, and adds to the original paint look. Some folks even attempt to create it using paint and other techniques.
