Yes I have. Worth the effort. I've used mothers, turtle wax, maguires and err, something I can't remember. You can buy real ceramic, but its $300 or more and not for amateurs
all of the products I've mentioned are Hybrids. REAL ceramic lasts for years. Hybrids last for 6-24 months, depending.
Wash
dry
Turtle wax bug and tar remover
wash
dry
mothers clay bar kit
clean with lint free rags
apply multiple coats of ceramic. Mothers wants 24 hours between coats.
I've 6 layers of mothers that's now 18 months old. Will need treatment in 3 months time, I'll probably wait till xmas as I want to do clear coat repairs too. Nothing like attacking clear coat with wet and dry paper
Time spent on preparing and applying hybrid ceramic is well worth it, for the first 6 months I could wash my car buy just spraying with foam and rinsing off with the hose. Zero mechanical agitation. Now it's a simple single wipe with the soaped up car wash sponge