Over the time, the brushed Titanium of the Luminor darkens a bit.
When you give it for a polish, you will notice that the titanium is getting brighter.
But, once again, with the time, it will get darker .
All this is not that spectacular, although.
So no problem if you have hairlines or dings, you can polish the titanium case of your Luminor, and now, Rad.
Best,
Nicolas