Hi Lynn To answer your questions: There are also black, brown and grey
patinas; some leave a matt finish, some shiny, some are mottled if
the metal is left in sawdust with the solution. They are less
dangerous when dry as there are no vapours to breathe in and if
sealed with wax or lacquer the surface coating is probably less
likely to be absorbed into the skin. For safety’s sake though it is
better not to allow patinated surfaces to come into contact with
skin as sealers can wear off and you risk adverse skin reactions.