a paint job is not just a paint job...

there is a lot involved to one that does not know - books full of advice, proccess, opinion.

i would say reputaion and respect from the jobber is the best proof...awards, certification, good old hands on know how,talent....if i were to have a car painted (i paint my own) i would ask for past examples, photos or real, come to the shop and see it and work - paint jobs are all in the prep work, painting is easy breezy.

simple things like is there a spray booth, bake oven, or just open room???

i would not judge by mess, condition of shop good or bad, i would want to see proof.

just my 2 cents
Jake