Yeah, definitely in the NYAQ era. The photos are hard to find but I've seen a few. The verso of Mohawk kind of shows the white face paint, but it's not a very clear photo.

Cheikh Lo, Maame (World Circuit)

Strange coincidence ... I'll be giving myself the Kenton biography "This Is An Orchestra" by Michael Sparke for Christmas, and when reading it will no doubt delve into the "Artistry In Rhythm" bio by William F Lee too that came into my possession a couple of months ago (I haven't tackled  that one yet, although glancing through it I have some misgivings - e.g. about how contemporary press coverage is worked into it, and excessively quoted at length). But I now did print out that Guardian writeup about Leslie Kenton's book as well and filed it in the Lee biography "for permanent reference". This thread from 2010 had in fact slipped my mind, and the link in the opening post is dead anyhow. So thanks for posting this, Andrea! (Though admittedly I am not sure I'd want to get the book - yet ...)