Pewter Patinas

Hello all,

I am completing a pewter flask that is just begging for a patina. Do
any of you know it conventional jewelry patinas can be used on
pewter? I have access to several liver of sulfur based ones as well
as the lumps. I know that there is a pewter product but I would like
to avoid buying it if something I have will do the trick.

Thank you,

Pauline Weldon