Are you SURE those are scratches? Almost all the marks are rendered WHITE and either lint or dust like. You've digitally inverted the image correct? True scratches on the emulsion side will remove the coating which will cause it to let the light go through. That will render BLACK when printed or inverted. Is it possible that you could re-soak this film, rewash this film, and only if absolutely necessary, GENTLY rub it with your bare fingers, re-photo-flow it, then dry?