hit up one of the pros custom detailers in central scotland, polished bliss up north scotland, refined details, miglior,valet magic and on and on.
you will get correction and protection easily at that price, and before you say it correction is often required on new cars.
if i was buying it new i would insist on pain of death that the stealers do not prep it. allow the pre delivery inspection but dont let them wash it.