If viruses are involved in forming age spots on the skin, would topical vitamin C treatments be helpful in eradicating them? In particular, would the Vitablosom liquid formulation of Liposomal Vitamin C containing 2000mg in a 2 ml volume work effectively for topical application of vitamin C in removing age spots?

You are parlaying your intuitive awareness of treating problem areas topically, in this case expanding from your recommendation for including vitamin C as a mouthwash as a prophylactic treatment for gum disease, to extend it further for other problem areas of the skin to receive topical vitamin C in the most absorbable form possible. And that is what this commercial product will provide. It will, indeed, diminish age spots effectively and that will be a quite useful approach.