In Renny Doyle's book on starting your own detailing business I have three sections.
One of the sections Renny asked me to share with the read that if I could do it all over again what would I change. In that section I talk about,
Cherry Picking
That is
the learned art of turning work down.
If you don't have his book, get it and read it.
Instead of taking on the hardest jobs that often times pay the least and offer the least reward, go after the jobs that are the easiest, pay the best and offer the most reward.
I know it's easy to take anything that comes along but picking up where some other guy left off and has already caused major damage sounds like a recipe for disaster.
My buddy Paul has a custom car shop where they build streetrods and paint cars and he won't "guarantee" a job that has been painted by someone else unless he can sand down to factory primer or the body panel because otherwise he would have to guarantee his work and the other guy's work and that's a recipe for disaster.
Unless you're hungry for work I'd let someone else have the blessing....
And like asked before?
Is this a Ceramiclear finish?
Here's an article on this topic,
Ceramiclear Paint Code Location on Mercedes-Benz
Here's another....
Ceramiclear Paints - Be Careful