There are 2 types of ceramic...
The full on ceramic where be it new or older surface (any surface) one does a full degrease, and clean, then apply,
exactly as per instructions under the correct conditions...
And if dont, or think better , you will have a streaky stuff up that pretty much will require a full block, cut re buff and polish.
Expensive and best to leave to correctly trained professionals.
I have played with a bit of this.. yep definitely got to know what you are doing and have experience..dont do it on your car without that.
Then there is
the ceramic in a spray bottle..
This doesnt last as long, 6 months or so , but as mentioned above very impressive
This you degrease back to the original surface.. all polish oils, films removed..
Im most cases, leave off any polish for as long as possible..just wash.. then a real good wash with a quality dishwash detergent.. And dry with couple towels.
In the shade and panels cool, very
light even spray 1 or 2 panels, wipe out even with soft cloth, leave 5 or 10 mins and a quick buff.
Do Not do the windows..but work extremely well on glass shower doors and
fiberglass walls
I can do the SSangyoug ute with full canopy in around 25 mins
Brake dust on rims is a bitch... A good even spray on clean mags.. then do the vehicle.. then go back give the wheels a light buff... next time you wash the car, the dust comes off real easy.
Or Just never use the brakes
The spray bottle cermics are expensive, up in the $50 bracket now... Only need a light even spray.. so goes a long way... Also once the 1st coat is on.. next time wash, I have found diluting down 1/3 polish rest water, shake well as use it, works really well.. Shower the same.. once a month.