a seal for a gas turbine engine component having an airfoil with a radial outward end and a radial inward end , one of which is bare metal . a seal member is adjacent to the bare metal end of the airfoil wherein the seal member is coated with a abrasive layer having a laser engraved surface with the top of the surface has less than about 5 % of the surface area of the base of the abrasive layer .