I have a coarse, thick beard & I can only get two good shaves from a Feather or any blade for that matter.
I've always needed really sharp blades, if not Feather, then it has to be a Gillette of sharper caliber such as Swedes (RIP) Yellows or Bleues.
Or the more rigid russian Rapiras.
Last few weeks I've found two things that works superbly on my face-fur.
First off, I tried out straight shaving, and wow, does it mow down those stubborn whiskers, even now, when my skills with the str8 is a bit from perfected, it works very nice, and that's with a full hollow, imagine what a 8/8 Wedge will do
Second, I was fortunate enough to get to try the Worlds Most PIF'd slant.
It was right on spot. Even with a friendly blade like a RED IP it worked good, but with a Feather it became a virtual lawn-mower
I'll definitely buy a long handled Sledgehammer Slant in the near future.
Can-can scratch patterns!