Technician A says the dwell time for phosphoric acid on bare metal is at least 1 minute. Technician B says it is advisable to scrub the metal surface with a scuffing pad after the phosphoric acid has dried from the surface to remove the excess coating. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B
A. Technician A only
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