I just went through this on a BMW....luckily I got the car within 1 hour of the dropping...here is what I did on the already clean car
get out the QD and blot it up/off
you will be left with the etching in the paint
then get the clay and see where you get with that (may pick up some more out from the pores of the paint)
then get out a compound/glaze combo and an aggressive pad and give it two coats....
I spent about 20 minutes on one spot between QD, clay, polish, clay, polish, sealant it was that bad...and in such little time!!!