Abstract: A method of micro-machining comprises the steps of selectively applying a light energy coupling substance to a substrate, the light energy coupling substance absorbing a selected level of laser light energy at a selected wavelength, directing a laser light beam at the selected wavelength against the substrate in areas to which the light energy coupling substance has been applied, and manipulating one of the laser light beam and the substrate to micro-machine selected features into the substrate with the laser light beam.

Abstract: The piston made in accordance with the teachings herein includes a primary compression ring groove, a bottom and rear wall surface of which are hardened by the method of laser hardening. The method includes the steps of spraying the primary groove with a graphite spray and then directing an angled elliptical in cross section laser beam at the bottom surface of the groove while rotating the cylinder head at predetermined parameters.

Abstract: A water tight decorative molding comprising two elongate side strips joined by an outward facing intermediate elongate strip for sealing and protecting a joint formed by the intersection of two surfaces. A plurality of perforations extend from the outward facing intermediate strip into a cavity between the two elongate side strips, increasing the surface area to which caulking may bond. After a bead of caulking is applied to the intersection of the two surfaces, the molding is laid over the caulking and is then firmly pressed down along its entire length. By firmly pressing the molding to snugly fit between the surfaces, the caulking material fills the cavity between elongate side strips and the perforations, providing a water tight seal.