I've had a new Fiat 500 from May 2008. It is a Cha Cha Cha Azure Blue colour and I have problems with very little black and orange marks, like pinpricks, on all the panels except the roof and the bonnet. They started soon after we got the car and the garage removed them by rubbing down the paintwork with a very fine abrasive stone and then polished the paint. They started coming back a few months afterwards and now cover quite a lot of the bodywork. The garage says it is fall out, nothing to do with the paint or corrosion from underneath, and a good polish with remove the marks. Being such a light colour makes it more noticeable. They have had one other car with this problem. If you run your fingernail along the paint you can feel the marks. I use Autoglym shampoo and polish, and it has always been hand washed. I haven't found anyone else at work who has this problem. Whilst I recognise that pollution can travel long distances, I don't live or work near heavy industry. Recently I noticed the filler cap cover looks a slightly darker shade than the paintwork and the bottom corners of the doorframe never look clean. Other than this problem the car is brilliant as you often say in your column - always a good read. Do you think pollution is the likely cause and the garage suggestion is a good idea? I'm worried it will just return again. Hope you can help.