1. Lost foam casting. The foam makes the mold for the liquid cast iron to be poured into. 2. Decking the block is he process of cutting down the portion of the block to which the cylinder heads mate 3. Deglazing is the least aggressive only removing the glassy look to used cylinder wall that still have a good crosshatch. The main purpose of honing is to finish the surface to a particular diameter and geometric cylindricity.