The next project on my bench is a 1968 Seiko Sea Lion M330. The dial and hands are original and in stunning condition, the movement is in pretty decent shape, but there is some brass peeling away from the lower arbor port in the main plate, so a jewel upgrade is in order. My question is about the case. This watch was certainly loved and worn a lot, and it shows it's age. There are some significant scratches. It does not appear to have been refinished in it's lifetime. I'm on the fence about doing any case work, but leaning towards giving it a go. If this watch your personal watch, would you rather keep the case in it's original (albeit poor) condition, or sand it down and refinish it?