Okay, so I've been trying to do some more research on the web for other instances of this occurrence. According to Error-Ref, my coin exhibits the "Special Finish Errors: Incomplete Proof Laser Frosting" (even shows the same type of coin!).
Now that I know what it is, and that it's not necessarily unique, I guess my question should now be changed to how I should proceed? I am still not sure how rare they might be, so if it would be worth it to have it graded to sell or just keep as a neat piece?