I assume you mean the paintwork and not the manifolds.
The community search works well for this, have a look here:
Hi Everyone, Can I ask what’s people’s opinion or experience of wax protection of your KIAs paint. Is Ceramic the best or traditional wax? Thanks Den
www.kiaownersclub.co.uk
And here
I'm thinking of having my car ceramic coated but there are wildly differing opinions on the Internet regarding its worth. I'm sure a few of you must have had your cars detailed and either ceramic coated or other treatments applied by now. Is it worth it and what are your experiences ? Cheers
www.kiaownersclub.co.uk