K.B.
I don't recall how many treatments my husband had, but he had the beard area on the neck done and it didn't stick. It thinned it out for a while and now it might be slightly less than it was before as I don't notice his neck getting as irritated from shaving, but he still has to shave it daily.
His beard is multi-colored (red, blonde, brown) so that could have been a factor in its effectiveness.