As previously discussed you should get clarification on exactly what he has done..
Also you should ask whether a paint depth gauge was used before they wet sanded (I doubt it..).
A profesional paint specialist (detailer) will know exactly how much paint is on the panel before any attempt is made to correct problems.
They will also know (depending on their level of experience) aprox how much of their paint depth reading is clearcoat.
Not all marks/scratches can be removed - but they can be significantly improved.
If the clearcoat has been completely removed form the area in question then it will start to look very bad very quickly - I would be surprised if this is the case but at the same time I wouldn't want someone randomly sanding away at my cars paintwork - a clearcoat that has been sanded to the point where it is extremely thin will also deteriorate over a couple of years.
Clearcoat failure = complete panel respray (and again you get what you pay for, I wouldn't expect anything close to a factory job for less than £500 - £600 on a door).
Cheers, Geoff. |