Spills of graphite powder can foul up the white leather on the flappers easily, and attach itself on too rough paint surfaces, hard to cleanup maybe. To be safe i would disassemble the whole keyboard and remove the nasty rocker from its slot. Keep track which rocker fits which slot by numbering them; with hand made instruments sometimes the width varies a little. - Nout
Ok. Couldn't get the powder to to the area but was able to get Howard's wood wax in the crevice using a metal ribbon ruler. Worked perfectly! Thanks for the suggestions!