I've just washed my car since first applying the Gtechniq ceramic coating/Serum - in the past I've used many different spray wax and regular wax products -by far, the best (as it should be) is the Gtechinq coatings. The water beading is better, dirt and dust doesn't stick as much, and the shine is at its best. It was easy to work with, I only needed about half the product for my car. The stuff isn't cheap but so far I think its worth it. Now I'm more inclined to try the premium glass coatings...
https://www.autoobsessed.com/collect...light-30ml-kit is what/where I got it.