Thanks for the note wiscos ..........
Hopefully the fettling has been done by previous owners of the car, as the car that I am looking at is a 07 Series 3. I will keep my eye open for water and fluids and also the bubbling that you mention..... I had a good look round the car on Saturday and could not see any areas on paint problem, but I will take another look before I take delivery.
Cheers ........ Pete
