...on one that's not coated, it's possible that someone stripped their SS4. The coating isn't difficult to remove with chemical stripper, although coated blades often have grind marks and "INFI dimples" under the coating.
It had a satin finish. Since they did not come from Scrap Yard this way, it is possible the temper may have been degraded.
Polishing those out would would be more difficult and probably also remove the logo stamp.
Not all coated SS4s have the "INFI" logo; like the one in the picture below. Even so, it's still INFI?
![[Linked Image from scrapyardknives.com]](http://www.scrapyardknives.com/images/StreetScrapper4_med.jpg)
