Abstract: A skin-treatment system comprises a plurality of fluid reservoirs, a selection valve operatively connected to each of the plurality of fluid reservoirs, a first pump operatively connected to the selection valve, and a handpiece comprising a treatment tip configured to apply treatment fluid from one or more of the plurality of fluid reservoirs via the selection valve and the first pump to a skin surface. The treatment tip may comprise a vacuum inlet configured to aspirate waste fluid away from the skin surface. A momentary switch may be located on the handpiece. The momentary switch may have an “on” setting under which electrical current is allowed to flow to the first pump, and an “off” setting under which electrical current is prevented from flowing to the first pump. The first pump may be activated only when the momentary switch is in its “on” setting.