Unless they did screw up the thickness of the clear coat or if the orange peel is severe. If the orangle peel is too severe, you'll have to sand through a lot of clear coat to even out the high and low spots out ... this may cause you to go through it. Normally, even on a bad paint job, there's enough clear coat to completely wet sand and buff the car several times ... so you should be fine. The easiest way to check is to test a small inconspicuous area first.