i want to get a scaffold ear pireceing but i got my cartlige done about 2 to 3 years ago but any way if i got a industrial done who would they do it with my cartlige done would thay use it and just make one hole instead of two
They most likely wouldn't use the cartilage piercing you already have because the hole wouldn't be in the proper placement for the bar to go through. You could always use your other ear though :)
It's possible, but chances are the hole isn't at the perfect angle to meet up across the ear with the second hole. Like previous poster said, try the other ear, or move to a different part of the ear.