Update: Am (sort of) patiently waiting on my powders
Meanwhile, I went to a local beauty supply joint to buy some black gloves and other odds and ends ... Two sales people tried talking me down from using henna. One eye-balled a few of my gray hairs - my semi-color is wearing off - and said henna won't cover gray.
Both said it causes build-up on the hair (And?). Plus, they were (of course) trying to pedal the same "gentle" semi-perm. formulas w/peroxide that recently jeopardized my curls. Well, I suppose I shouldn't be surprised. They're biased and trying to earn a living
Can't wait for my stash to arrive