Caveat, I'm sorry that you feel this way, we would have no problem with any independant inspection you want to come to us with.
Some cars are dependant on climate etc, I've a customer that recently ate me over a "common problem" on an Audi TT, said how could it not be covered etc. It's covered in this other country, how do we not know about it etc etc.
Turned out the problem he was on about was specific to the American TT and only very few cases were ever found in Europe. As far as we are concerned there is no problem but in America it's a recall.
As regards damage/pait job, we would often service, valet and touch up a side of a bumper or sometimes replace a wing but that doesn't count as structure damage so there is no need to say it unless you want to. Sometimes a salesman might miss it when it comes in, sells the car to you and may only discover the paint later when he/she sees the car later.
Check with your insurance company, even when they payout after a claim, unless it's structure damage you won't get deprecation money.