That shouldn't matter unless you just want to look at it instead of using it. I've tools that are really old and worn down.
True story: I was helping a farmer stack his hay bales... and I found an old crescent wrench that was in bad bad shape (I mean parts of it were corroded). I could only make out that it was a Craftsman and with that lifetime warranty, I took it in to Sears (when they were still around) and they actually gave me a new wrench for it.