I have my doubts about ceramic coatings. The claims made for them are miraculous, and for me it doesn't compute how 30ml of coating over an entire car can do what they claim.
I use Menzerna products, Step 1 400 for heavy cut, Step 2 2500 for medium cut, Step 3 3500 for polish and Step 4 Power Lock sealant. It's expensive, but only the best for my baby.