hey guys have block got perfect compression on it when i tested it using it purely for the block and building a motor around it bc i melted a piston in my last one while cleaning up the mating surface and piston heads i noticed since the block was sitting for so long got some rust on the cylinder walls i attatched pics any advice i lightly hit it with a non scratch scotch bright and lightly with steel wool but am too scared to take out the cros hatching here are some pics thank you
