Timely thread for me since I've been working with mine of late. I shot some content on it yesterday that will probably go up next week.
Short answer - Ceramic is 100% worth it if you want an easy to keep clean car that looks amazing all the time, but I'd consider a DIY product as things have improved in that area since I had mine done professionally.
I also had PPF (Xpel was the brand) applied to the front end of the car, and the mirrors. Ceramic was then applied over the PPF making it super easy to knock off the bugs. 5 years down the road I have almost ZERO paint chips, like count on one hand, and the PPF is still in excellent condition. If I had it to do again, I'd have had PPF also installed behind the rear tires.
If the paint is scratch/swirl free then I'd just wash it in dish detergent to remove any previous wax (I'd use Dawn).
Then clay bar. You might consider the Mother's Speed Clay 2.0 (it's a synthetic clay like sponge and may be a little softer on the paint)
Speed Clay 2.0:
https://amzn.to/3GOBM5X
Then wipe it down with panel wipe:
https://amzn.to/3MoHWe2
Finally apply Crystal Serum Light:
https://amzn.to/39729ra
The entire process above would take 90 minutes tops and be good for at least 3 years (that's where I'm at on the Mrs. car so far).
Longer answer:
I had the Hellcat professionally ceramic coated in September of 2017. The product used was Gtechniq Crystal Serum which had a "guarantee" of 7 years, supposedly longer if garage kept. I had it done just a couple of months after purchasing the car. Installer surveyed the paint, determined it needed very little paint correction, and knocked the price down from $1000 to $600 as a result. He polished 2-3 little areas where he saw a blemesh or two, and applied the ceramic. Most of the labor is in the paint correction, so keep that in mind. If you apply ceramic over scratches and swirls it will seal them in.
I have been THRILLED with the results. My goal was to reduce the time it took to clean the car as much as possible. I've not really done anything special to take care of the ceramic and in fact treated it pretty harshly over the past 5 years running it through a touchless car wash several times a year and only hand washing the car a few times a year sometimes going 6-8 months without washing it at all. I'd just spot detail the front to get bugs off, and behind the tires to remove any road grime using Ech20 mixed as a detail spray.
The Ceramic has 110% made keeping the car looking fantastic super easy.
I wanted something similar for Mrs. Speedy's ride, but didn't wanna pay $600, so we went with the consumer version of the same product professionally used on the Hellcat.
This is what I used:
https://amzn.to/39729ra
Her car was also new, the paint was in great shape, so all I did was clay bar and use a product called Panel Wipe (
https://amzn.to/3MoHWe2) to prepare the surface and applied the Crystal Serum Light. That was 3 years ago and her car is still slick as glass and looks amazing.
I recently noticed "something" on the hood, roof, and trunk of the Hellcat that had a roughish feel to it. Paint still looks amazing and water beads/sheets right off but the top doesn't feel near as slick as the sides. I probably should have been doing a better job of hand washing to prevent it rather than going months and months but live and learn I guess. I'm going through some steps to resolve it, none of which have bene labor intensive, but I always start with the least invasive and work my way up. I expect to have it 100% by the end of the week and I'll let you guys know what I had to do.