White residue on black exhaust port

Has anyone figured out how to remove the white spots? I’ve found nothing that works so far. Image Unavailable, Please Login

 

This looks like the black exhaust equivalent of the brown marks on the silver exhaust. I wonder when the Scuderia will come up with a solution for both ?

 

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For the chrome exhaust on my 296GTB I used Gtechniq Metal, M1 All Metal Polish and Chrome Cleaner for All Metal which worked a treat, not sure how it will perform on the black exhaust.

Interestingly, I have the black exhaust on my GTS and there is no discolouration after 4+ months.

 

Same - no discolouration after 9 months and 1,400 miles!

 

So neither one of you have those white spots, and some of us do. I wonder what the cause might be then.

 

I suppose Ferrari or the dealer could have coated the exhaust but nobody mentioned anything.

Alternatively maybe additives in the fuel or humidity/water vapour picking up impurities in the exhaust system causing it.

 

I also think fuel quality and additives might have something to do with it… I am in the UK and only use BP and Shell premium grades.

the other thing to consider is quality control at the factory - there could be an issue with the finish / coating on certain batches …