Does the scratch impact on the Beam Quality in a way that will either hinder your use, or niggle you?
If not, why worry? The UltraStinger will get scratched and worn soon enough. Some consider this personalization, giving a flashlight character. It shows that you use your tools, and that they get used lots.
On the other hand, why should you have to make do with a flashlight that gets scratched and worn so easily? Surely a tool designed to be used should be able to withstand general use?
I assume you got an UltraStinger because it produces a bright tight beam, and is a little bit smaller then a hulking MagCharger or SL35X. Oh, and it's cheap.
Al