Has anyone here micro etched material? I'm going to start learning the process of micro etching and have the oppertunity to do it to a bolt. I'm wondering what purposes it would serve... I know that from micro etching, you can see how a certain product has been formed from the lines, is this usuful to see if the batch of whatever it is you're producing is good? Thats the only purpose I can see of it, because once the part is eaten away by acid.. you can't really use it. I'll be doing it on a bolt.. I think I can guess what it would look like, I'll see lines running perpendicular to the head of the bolt, then where the top of the bolt is, the lines will sorta spread out.