Abstract: In a touch up kit for painting small surface areas, an outer container contains a paint or primer coating material and an inner container contains a catalyst for the paint or primer material. The inner container comprises a bottom seal member closing the bottom of the inner container and an upper seal member closing the top of the inner container. The inner container is nested in the mouth of the outer container. The upper seal member is pierceable by a blunt instrument such as the inlet tube of an aerosol spray canister and the bottom seal member is designed to be detached from the bottom of the inner container in response to downward pressure on the bottom seal member by the inlet tube of the aerosol canister.