Fingers or no fingers, the concern here is whether the hair is fine or medium. Laser can’t “see” any hair that is not dark, dense or coarse. The preciseness of treating individual hairs, no matter what the color or structure of hair is, is the domain of electrolysis. The visual difference is seen immediately. No need to wait for shedding. Basically, laser is not the answer for your for fingers. Happy trail is also fixed easily with electrolysis.
It would only work if the hair is coarse.