Keith and Mike,
Sorry for the delay, i was out with the flu last week.
Now the answer to your question could be a tricky one. The knife, which i hear can cut a tank in two, really is desinged for rough use. This use will absolutely mar the finish. Scratches and scuff marks will occure. Any aggressive work on the blade to remove those marks will remove the "first production run" etching. It will also change the color of the spot worked on. The tricky part is wether you want to use this knife as it was intended, or save it as a future collectable. If you use it, it will get scratched up, but just like with a new pick up truck, that first ding will hurt. Just grit you teeth and go cut another tank in half!
I hope this helps,
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Joe Houser
Director of Consumer relations
Buck Collectors club Administrator and member #123