Castellani Paint Modified - foot ulcer

Has anyone else tried Castellani Paint Modified on ulcers or Genetian Violet? My mom has a really bad ulcer on her foot and I am on day two of wrapping it in a Colloidal Silver salve mixed with goldenseal powder. Sea Salt along the edges to prevent spreading. I wish she contacted me sooner as this is over most of her foot. Her holistic dr wants it to turn black so he can treat it as a burn. I am not so sure about that Tweet