Nope, I dont have a paint depth guage, just wondered what his were, as Nissans have notoriously thin paint.
One thing I would ask them though - if they dont measure the depth of the paint, how did they know that Darren hadnt had a bash at it himself with a rotary and taken off most of the clearcoat off, then swirled it to hell, and now when they correct it, how do they know how aggressive they can be? I've seen enough cases on DW to know how easy it is to burn through clearcoat with a rotary