I don't recall the case of anybody grabbing a doritos bag and seeing trough their fingers, but a lamp behind your hand definitely can turn your fingers transluc

I don't recall the case of anybody grabbing a doritos bag and seeing trough their fingers, but a lamp behind your hand definitely can turn your fingers translucent. Maybe with both effects combined? The more valuable contribution here is probably the idea IMHO. To know that the optical effects of the light can be manipulated with the correct stuff and we could search for it. An ointment seems of to be useful to a restricted volume, to maybe the first millimeters of the skin. We evolved totally transparent proteins that are hard, resilient and harmless. We have them in the eyes so we know how to do it. If we could only suggest the body to temporarily accumulate those proteins in the upper layers of the skin, or we could inject temporarily the proteins in local areas of interest that would be awesome (and maybe safe as long as is our own human protein)... On the skin the continuous shedding of the upper layers would probably self-fix the stuff.