Since emery paper and brush were analyzed together at the lab, it is not known if the emery paper collected viruses or loosened them for the swab to collect.
This glazing can be easily removed by either gently using emery paper on them, or by driving the vehicle carefully whilst implementing light use of the brakes for several miles.
The wool producer is responsible for ensuring that the shearing shed is ready for shearing by testing the equipment, cleaning, disinfecting the shed and supplying emery papers, wool packs etc.