I'd remind you that the OP is asking for topical applications.
That said, I'd also add that have been working with a well documented case of Argyria(turned blue) over the past months, involving someone who drank too much properly made CS for too many years.
The good news however is that the condition in its mild form, does not appear to be permanent in that it will regress once the intake method(ingestion) are interrupted. Though will also return upon resuming.
Furthermore, it has been my observation that the silver compound can be disassociated in the basal layer to completely reverse the condition. However, since the conditions appears linked to bio-accumulation, it will subsequently return in time following the reintroduction of silver compounds into the body.