Hmmm service book, well my local bmw dealer recons it's had a fair few services.... But no book when I bought it.
It's at 95k now and when I bought it last November I took it straight to them they were surprised to see it so soon, they had only serviced it the week before.
I can only ask
I might just be as well to give it a good go with the rust killer as its only lite spots , funny thing is the paint doesn't look broken from the outside so I thought it was inside rusting through, hence why I was taking the panels off.