My El Camino is single stage paint and needed wax all the time. It had some oxidization and needed a good professional buffing and wax anyway. I took it to a local guy that did a full detail on it, and then put on the ceramic coating. After two years is still has an amazing shine.
Right after I did the Elky, we bought a new Macan for my wife. We had a clear bra put on the front end parts, and the loading area for the rear. Then we took it to the same guy. The paint was only a few months old so he was happy to not to have to do much cleaning. It too looked great, and got shinier than factory new.
I finally even took my 911 to him. Again single stage paint. It is pretty shiny already and did not get any more shine to the paint, but it beads water really well.
One added bonus is dirt and bugs wash off easier. The 911 looks so good the young strangely dressed chicks just come hang out next to it.
