Jode5 said..
We trilled one of the top expensive professionally applied ceramic Coatings to our cabin top and it was no better or probably worse than a good polish with good wax like Collinite 925 fibreglass boat wax or better again Collinite 915. Doesn't waist you money.
I actually use both Collinite 885 (Fleet was) which is a hard was and Collinite 925 which is liquid. I think the hard wax is slightly better.