A method for producing a seal, comprising: (a) providing an annular seal having: a lubricant end and an environment end facing in generally opposite, generally axial directions and separated by a distance, the lubricant end being a generally planar surface facing generally away from the environment end, the environment end being a generally planar surface; an inward surface of annular form facing in a generally radially inward direction; an axial extension of annular form extending axially beyond the lubricant end and formed at least in part from the inward surface and having an outward surface facing in a generally radially outward direction away from the inward surface and encircling at least a portion of the inward surface, the outward surface located in radially intermediate relation to the inward surface and the lubricant end; a dynamic lip of annular form projecting radially inward relative to the inward surface and having a dynamic sealing surface of annular form facing in a generally radially inward direction; and a liner of annular form composed of plastic defining the dynamic sealing surface, the axial extension located in radially intermediate relation to the dynamic sealing surface and the lubricant end; and (b) removing at least a portion of the axial extension by a machining operation, producing a machined seal surface facing in a generally axial direction away from the environment end and located in radially intermediate location to the lubricant end and the dynamic sealing surface, the machined seal surface being a generally planar surface. (a) providing an annular seal having: a lubricant end and an environment end facing in generally opposite, generally axial directions and separated by a distance, the lubricant end being a generally planar surface facing generally away from the environment end, the environment end being a generally planar surface; an inward surface of annular form facing in a generally radially inward direction; an axial extension of annular form extending axially beyond the lubricant end and formed at least in part from the inward surface and having an outward surface facing in a generally radially outward direction away from the inward surface and encircling at least a portion of the inward surface, the outward surface located in radially intermediate relation to the inward surface and the lubricant end; a dynamic lip of annular form projecting radially inward relative to the inward surface and having a dynamic sealing surface of annular form facing in a generally radially inward direction; and a liner of annular form composed of plastic defining the dynamic sealing surface, the axial extension located in radially intermediate relation to the dynamic sealing surface and the lubricant end; and a lubricant end and an environment end facing in generally opposite, generally axial directions and separated by a distance, the lubricant end being a generally planar surface facing generally away from the environment end, the environment end being a generally planar surface; an inward surface of annular form facing in a generally radially inward direction; an axial extension of annular form extending axially beyond the lubricant end and formed at least in part from the inward surface and having an outward surface facing in a generally radially outward direction away from the inward surface and encircling at least a portion of the inward surface, the outward surface located in radially intermediate relation to the inward surface and the lubricant end; a dynamic lip of annular form projecting radially inward relative to the inward surface and having a dynamic sealing surface of annular form facing in a generally radially inward direction; and a liner of annular form composed of plastic defining the dynamic sealing surface, the axial extension located in radially intermediate relation to the dynamic sealing surface and the lubricant end; and (b) removing at least a portion of the axial extension by a machining operation, producing a machined seal surface facing in a generally axial direction away from the environment end and located in radially intermediate location to the lubricant end and the dynamic sealing surface, the machined seal surface being a generally planar surface.