A bee brush is often used to move bees off the comb, but can also be used to brush them off yourself, equipment or to help a swarm into a box. The bristles are soft enough to not harm comb or the bees.
To remove bees from a surface, carefully brush perpendicular to the surface. Be careful not to press too hard, especially on open brood cells and open honey cells, as you may either injure brood or make a mess of the honey.