Page 13 2013 Barcelona Montesa factory and Trial team tour
Here the main mechanic has just replaced the wheel and wipes the grease from the end of the nut. The smiley mechanic on the right is removing the old decal to apply a new one to this Bou bike.
Yes, he is sttiiiilllllll wiping the grease from the end of the nut. It is an important job. If any grease gets on the disc, braking will be gone. You can see Josep chatting in the back ground with Oscar.