[CaptainJack]

When I was looking round the car I noticed the exhaust tip was pretty blacked up, what's the best for cleaning it? The rest of the car was immaculate.

 

[Maleko]

Personally, as the exhaust is hidden I wouldn't worry about it, doesn't take long for them to get blacked up again, especially a diesel one.

However, on past cars that had exposed chrome exhausts I just used a good chrome cleaner.

 

[Sam]

You must have had a good poke around to see that! I would only worry about it rusting really rather than it being dirty and it should last a good number of years before rust is an issue.