Antipolishing ring

A method, comprising:

• moving a piston in an upstroke direction relative to a cylinder bore, wherein the piston has a crown end and a first land adjacent the crown end, the piston is disposed in a cylinder bore of a cylinder;
• during the moving of the piston in the upstroke direction the piston moves in a lateral direction, scraping the first land of the piston with an antipolishing ring positioned in a recess disposed in the cylinder bore as the piston moves in the lateral direction, wherein the antipolishing ring includes an inner annular surface having a first protrusion longitudinally offset from a second protrusion as measured relative to a longitudinal axis of the antipolishing ring, the first protrusion with a first lip that extends from the inner annular surface to a first edge and the first protrusion having a first inner face that extends from the first edge to a second edge positioned along a lower face of the antipolishing ring, wherein the first and second edges are configured to scrape a deposit on the first land of the piston;
• moving the piston in a downstroke direction relative to the cylinder bore;
• and
• during the moving of the piston in the downstroke direction the piston moves in a lateral direction, scraping the deposit on the first land of the piston with the first and the second edges of the protrusion on the antipolishing ring as the piston moves in the lateral direction.