How many of you guys (if any) opted for a rust spray/protection on your cars? Didn't do it with mine as I didn't think I'd drive it through the winter. Had my last car done at Krown but don't like the fact they have to drill some of the panels to coat it properly.. and it's a yearly thing too.
I opted for an 'elecontric static/rust protection' option from the GM dealership when I bought an SUV couple months back.. apparently life time and no spraying required. Not sure if BMW offers something as I dismissed their post purchase options.