As soon as everything was cleaned, we coated the cylinders with motor oil. Just because we weren't going to bore our 318's cylinders didn't mean we had to prep them. Using a simple cylinder hone, we honed each cylinder until a nice crosshatch pattern appeared. After that was done, we cleaned the block again and then oiled the cylinders. Even letting the block sit just overnight in a home garage will allow the cylinders to flash rust.