Mad as hell

Must have happened last night and I didn't come out to my car until 4'ish today and it has been 88F where I am.

Eggs were cooked onto the paint. Spent 2 hours cleaning that side and there are some patches where the paint is a different color now.
If I ever caught whoever did it.....Swear to god it would not be pretty and there would be some serious retribution. No other cars were hit -- just mine.

Anybody else ever have this happen to them?
Any suggestions as to the paint?
Where can I find touchup paint for my Pearl Gray Metallic TE? Should I just go to the local benz dealership?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k