Just a little add on, If you go with ceramic, polish the body properly otherwise all imperfections will be locked in beneath the coating. If you get it professionally done it'll cost you north of £350. Now, its so easy to apply.. Basically there are two solutions that you apply with a sponge pad labelled 1 and 2. When ready you wipe on the first solution and when finished you wipe on the second solution straight on top. When that's dry just buff it off using a micro fibre cloth. Job done.

Look for GardX and you can get a full set on the Bay of E for between £25 an £40 including glass and interior treatment.