Sorry to hear that. Hopefully you can buff it out. Durability still worries me. I’ve yet to bang it against a door, but it’s only a matter of time. Previously my SS have always withstood that sort of thing with no issues whatsoever. I am going to make a decision, but seeing this helps
Let me know if you can buff it out. That may help me too ha!
The odds are super-high that if you start trying to do anything more than softly rub with a clean microfiber and water you're going to make whatever mark you're trying to eliminate - and the whole surrounding area - very noticeable, and it's not likely to matter whether you're using Cape Cod cloths, Barkeeper's Friend or a ScotchBrite pad.
Even if the case is raw titanium with no anodizing or surface coating, you will *never* match the look. I refinish knives with titanium scales ("handles"). If they are going to be refinished to hide snail trails, rub marks and other use and wear marks, you have to refinish the entire surface (and do both sides). Even if you use the same finish media that was used the first time, differences in the tank pressure or spraying from a couple of inches closer or further away makes a big difference in how it looks.
This is not like trying to polish up one of the bright stainless steel watches.