They may find the overage makes it easier to inspect. Someone looking from a distance can tell it has been applied. I looks like they have an automated burette putting a drop on each at the place where the blob is and then letting gravity and capillary action distribute it around the perimeter of the primer pocket. They let it dry without carefully wiping off the excess. Whether or not that blob is dark or thin then depends on how much solvent they had mixed into the lacquer at the time it was applied.
If it bothers you, a primer sealant solvent can be identified. Dampen a rag with it and wipe every round across the rag and let the remaining sealant dry again.
If it bothers you, a primer sealant solvent can be identified. Dampen a rag with it and wipe every round across the rag and let the remaining sealant dry again.
