How often/ when to detail

[jacklavender]

I have an ‘82 911 SC. It’s galvanised and fairly clean as far as rust goes but there’s blistering round the petrol cap cover and in the corner of the door sill. I’m not planning on entering it in a show or anything but I wouldn’t like to see it melt.

Does rust ‘run away’ if you don’t treat it? Should I be doing some detailing each year? What is everybody’s strategy for bodywork?