I'm a huge believer of ceramic coatings, regardless of the car or it's use.
Keeps the paintwork looking great, easy to wash, wheels are simple to look after & if you do the glass properly, it makes for a relaxed drive in the rain with no wipers.
I've posted a couple of pic's in to some threads in the past.
They are looking nice :thumb Are you sure about this, they can be a twat to get off lol
vwcaliforniaclub.com
and
I managed to dodge some clouds the other weekend and set to work on sprucing up the paint work on my Cali. It’s not that is was in awful condition, but I knew I could get it to a better standard. My process. Rinse with water. Snow foam and let it dwell. Rinse Snow foam again but this time...
vwcaliforniaclub.com
There's a fair few others too, with equally nice shiny piccies.
In summary, preparation is the key piece of work for this job.
The Cali is a huge beast & a full job can take 2 days work, depending how far you want to go.
It's easy enough to do as a DIY'er, just take your time & maybe practice on another car 1st!
I rate the GTechniq product range, if you search on YT you'll find loads of beading & sheeting videos.
I've not had my coating on this Cali long enough to comment, as it was a lockdown project, but I know my 20k miles a year Volvo looked great 18 months after I coated it & still beaded nicely.
DIY v Professional - For sure I believe the pro's will do a very good job on the paintwork, with some OCD people in the trade, but you'll pay handsomely for the service. Personally, I'd never pay for Main Dealer paint work protection, as I suspect they slap it on to existing paintwork with little to no prep & charge top dollar for cheaper products.
Not sure if you'll ever see any return/protection on the investment.