A system for applying a finishing material to a work surface including a handle assembly including a hollow, tubular body with a proximal end, a distal end and a handle bore extending between said ends; said handle assembly including a linear actuator with an extendable-retractable member configured for retracting into said handle assembly and extending from said handle assembly distal end; a material reservoir mounted on said handle assembly distal end, said reservoir including an interior configured for receiving a quantity of finishing material ; said material reservoir including an inlet to said interior and an outlet from said interior, said inlet and outlet respectively admitting and discharging material with respect to said reservoir interior; and a plunger in said material reservoir interior and connected to said linear actuator , said plunger configured for discharging said material through said outlet , which system characterized by : a push-to-open valve assembly connected to said reservoir outlet and having a closed, extended position and an open, contracted position; said valve assembly including an outer sleeve connected to said handle assembly and an inner sleeve reciprocably positioned in said outer sleeve , said outer and inner sleeves each including: proximal and distal ends and a sleeve bore extending between said sleeve ends; said valve assembly including a valve member reciprocably mounted in said inner sleeve bore and movable between: a closed position closing said outer sleeve proximal end with said valve assembly in its closed position and an open position with said valve member spaced from said outer sleeve proximal end and admitting material from said reservoir into said valve assembly , said valve assembly being movable from said closed position to said open position by pushing said applicator against the work surface; an applicator tool mounted on said valve assembly and configured for receiving material from said valve assembly and applying material to a work surface; a valve return spring positioned coaxially in said inner sleeve and connected to said valve member ; and said valve return spring having an expanded configuration biasing said valve member into sealing engagement with said sleeve proximal ends and a contracted position with said valve member in its open position spaced from said outer sleeve proximal end. a push-to-open valve assembly connected to said reservoir outlet and having a closed, extended position and an open, contracted position; said valve assembly including an outer sleeve connected to said handle assembly and an inner sleeve reciprocably positioned in said outer sleeve , said outer and inner sleeves each including: proximal and distal ends and a sleeve bore extending between said sleeve ends; said valve assembly including a valve member reciprocably mounted in said inner sleeve bore and movable between: a closed position closing said outer sleeve proximal end with said valve assembly in its closed position and an open position with said valve member spaced from said outer sleeve proximal end and admitting material from said reservoir into said valve assembly , said valve assembly being movable from said closed position to said open position by pushing said applicator against the work surface; an applicator tool mounted on said valve assembly and configured for receiving material from said valve assembly and applying material to a work surface; a valve return spring positioned coaxially in said inner sleeve and connected to said valve member ; and said valve return spring having an expanded configuration biasing said valve member into sealing engagement with said sleeve proximal ends and a contracted position with said valve member in its open position spaced from said outer sleeve proximal end. <EOS>