Possibly. The advantage a body shop would have is a large walk in curing oven. That could either increase the state of cure of the part. Or cross-link a coating to the surface. Or better yet both. Without the ability to physically cross-link the coating to the substrate with heat. We are counting on a chemical reaction to do that. Not impossible. But difficult.
So depending on the knowledge of the technicians and adequateness of the shop. It is possibly value added.