A hand applicator system (100) for spraying a human or animal body (10), the system comprising: a hand applicator (110)； and a travel speed indicator (120) which indicates the optimum travel speed of the hand applicator over a region of the body, wherein the travel speed indicator emits a signal to an operator of the hand applicator, the signal varying during a spraying procedure and being indicative of the appropriate instantaneous travel speed of the hand applicator over the region of the body adjacent the hand applicator at any time.
