hey i got an lq4 and was told it had 16,000 miles. i am switching the crank(because it is the older version and has the longer flange) so im taking it apart to have it all balanced. here are some pics of the cylinders and pistons, is this normal wear or ? should i just throw it back together and call it good or hone and re ring it, or ?

one of the cylinders has slight surface rusting