So for the past month or so I have noticed that I have this black powder on the floor of my garage under the car and cannot figure out where it’s coming from It’s not oil but a powdery substance I looked closer under the car and noticed that it streaks down the exhaust and the exhaust looks like it might be rusting I have a 2015 F type R. Any thoughts ?

I don’t usually warm the car in the garage. I live in Florida so it’s usually pretty warm down here so I use the car regularly. i’m actually going on a trip so I made an appointment with jaguar to drop the car off today. I had heard about some rusting of parts underneath the car on some other post something to do with the crossmember, is that something that I should have them look at as well while it’s down there? Anything else you can think of that I should have them check out for the 2015? It is a certified preowned car