Guys dont sweat the return just enjoy the car and look after it, the BVRLA guide is a good place to check, with my last car they tried it on for one alloy with a knick in it the usual £55.00, I was messed about with the pickup of the car, wrote a letter complaining and they waived the charge.
A family member runs a car detailing business and he regularly details cars that are to go back after the finance period is up, he recommends that you dont get minor damage fixed as its more expensive because most of the cars they pick up go straight in to auction the finance company dont even bother fixing minor scratches and nicks, he says many folks he knows got quotes from independent body shops that were 3-4 times more than what the vehicle assessor quotes so you are often better off just leaving the damage, also if like me you get messed about with pickup and or inspection times you can get the charges dropped completely, I have a copy of the letter I sent to them somewhere if anyone interested in seeing it.