So, there's this metal finish technique that I'm, well not really "fond of", but curious about it's history or just how it's done. In Mandarin, it's something like "Stonewash". As the finish resembles (or actually is) metal "washed" with flowing rocks. I tried "rockwash" and "rock tumbling", but both seems to relate to the finish but not EXACTLY it. I had a IMCO lighter with this finish on brass, and it looked pretty nice tbh, and I'm a bit buy-curious about other gadgets with this finish, since I've also seen zippos with this finish.
Edit: Thx for replies, as it turns out, "Stonewash" is the actual name of the finish. It's just how the term is more commonly used for jeans than actual metal finish, oh well……