Can you remove the dye once processed or if in unwanted area?

If the dye has already dried, it will be tough to remove. On a wet dye stain, try soaking with rubbing alcohol. Dab the stain with a paper towel to remove color, reapply rubbing alcohol, and dab some more. If alcohol does not work, add a bit of liquid laundry detergent to the stain. Scrub with an old toothbrush, then rinse in warm water to remove detergent and alcohol. If working on white fabric, bleach may work to remove small spots or stains. If the stain persists, consider redyeing the garment with a darker color rather than discarding the garment.