@Behind The Bins - Don't let him touch it, under any circumstancesOk just spoke to body shop manager
He said they would use a mop (rotary polisher) and do a three stage polish
He said in all likelihood he couldn’t get it 100% but should be fine
They prep all incoming second hand cars with the process above without issue
They WILL trash the paintwork & try to cover it with a filler heavy products IMHO
TBH if someone said a brand new car needs a stage 3 machine polish I would be a bit worried
Sorry it has to be a Pro-Detailer all the way
But its your car & if your happy thats all that matters TBH
But you did ask !