This dime has carthwheel luster, and is not impaired in the least bit. However there are scratches all over it. How can a coin be scratched and still have carthweel luster?
Die polish lines can be confused with scratches, however I don't think that's the case with your dime. I think scratches are what caused the scratches. Die polish lines example:
Not that I'm aware of. Die polish lines are certainly common, although some more drastic than others. When the polishing is done due to a die clash, you want the coins struck before they polish them! lol Here is an example of a die clash where they did polish some of it, but not all of it. Something like this doesn't even carry a premium.
Generally speaking, no... but as with anything, there are always the exceptions. For example, if one collects such things and just has to have it, they may be willing to pay a tiny premium, but overall most collectors would view it as a sub par example that, if anything, should be discounted. Not that any of this really matters with the coin in question though.
Detecto - My own fault, I should have read what I typed before clicking reply, but I was in a rush and didn't. I left a word out - unimpaired. My original comment should read - it doesn't have unimpaired cartwheel luster. As for the notion of die polish lines - yes, it looks like the coin does have some die polish lines on it. But it also has a lot of fine scratches on it. That is quite clear in both pictures, especially the second one. But to answer your question - how can it be scratched and still have luster ? Easy enough, there are not enough scratches to completely destroy the underlying luster. But when there are that many scratches it most definitely impairs the luster.
There appear to be quite a few die polish lines in front of Roosevelts forehead. These do not generally bring any premium and may in fact make the coin less likely to sell.