Can I DIY a ceramic coating?

Yes you can. There are DIY kits available for sale on the internet, formulated especially to be user-friendly for application by enthusiasts. We have tried a couple and we like them. They are not quite as 'stunning' as a professional ceramic coating, even when you polish up a car to a professional standard, which is where most of the shine comes from. They generally last about a year, and they can be a good budget option, comparatively, if you are already somebody who spends a lot on boutique car wax. Ideal for enthusiasts who enjoy polishing their car and will get enjoyment from doing it.