One use for the hard felt that I have found works wonderfully is when it's cut up into little hand held squares and used with polishing paste (Maas, Flitz, etc) to get into the nooks, crannies, stabilizer bars of razors. WOW do those felt pads work GREAT for that! They have a hard enough edge to really get into the tight spaces, but they flare enough when rubbed to turn into a scratchless bristle machine.
I may end up cutting ALL of my hard felt into little squares and selling little resto packs of them for next to nothing.
Chris L