Just a little frustrated at the moment but maybe due to my lack of knowledge (noobiness).

Panel beater told me to remove EVERYTHING off the body before going to blasting - of course no issue there.
Once the van hit the blasters he wants all the panels back on, which I didn't know so I am madly cleaning up old bolts and screws to give him! I knew he would have to hang the panels but I thought it would be after some crucial body work was done - is this normal?