Air dryer

http://www.nationaltoolwarehouse.co...Cu3DhxbJN5x0-K5D0CXXP-wK05ee-KYwIqhoC2z3w_wcB one of these after a dessicant trap on my bodywork side in addition to water traps and separators on every outlet. Standard replacement for that filter is 1000 sheets scott tissue. Inexpensive enough to throw a new one in before paintwork.