I've tried to do some cheap scuff and shoot jobs for a couple customers that didnt have the money to do it decent. but every time I ended up sanding it down the way I always do because its not that much extra work and I feel much better about it. The only way to do a scuff and shoot for me is to send those cars to the econo paint shop up the street. Personelly, I'd much rather NOT work than do bottom of the barrel work. It'll ruin a good rep or prevent you from getting a good rep.
Avoid scuff & shoots at all costs ,give them a proper sanding and eat the extra labor,Unless your working at the econo paint shop then you gotta do how they say at least its not YOUR rep. that suffers