Hasn't been fixed yet and I don't think expecting a knife that costs $70 to arrive without a flaw and when one is pointed out, to be called a liar. Cool that you roll that way. Most people do not. Good for you to enjoy the back and forth of returning defective products...I do not.
Wow. Have you got my point twisted around. I enjoy dealing with customer service even less than DIY dentistry.
But from your post, you said the company rep sent you a picture of (supposedly) your knife with the mark gone. I can only assume that he will send it back to you good as new. So whether he was covering his butt, or the acetone worked, or what ever. It appears that you are getting what you want and what you initially thought you had purchased. An unblemished knife. Which was the whole point of the process isn't it. When that happens, the reality is that the company stood by their product and their guarantee which is most likely to fix or replace any defects. As to your being called a liar. No I don't think that's right, and it pisses me off if I get called one to. But that is not what you reported, (you didn't say "he called me a liar") instead that is what you inferred by his comments.
Truth be told, you don't know for certain that he didn't fix the problem with the acetone. Could have happened for any number of reasons. A couple I mentioned. The whole point of my comments were that it appears the company is fixing the problem one way or another and you will be recieving the unblemished knife you have every right to expect. Which supposedly is the whole point of the exercise.
However, from the title of your thread, "...Who's right?" it sounds like your whole purpose at least of your post, is to fix blame. Presumably to satisfy some indignation you have. OK, fine if that's what it takes, more power to you. The point of my post was to offer up the alternative, just let it go. You are getting what you are entitled to and the company is standing behind the product. As far as you feeling you were called a liar, you might want to give the benefit of the doubt. Judging on how far off you were regarding what you thought I said, you might want to give the company guy the benefit of the doubt as well.
But that's all just a suggestion. If you want to keep that anger burning, by all means, knock yourself out. Whatever makes you happy.