Do any of your products darken lead solder? A Do any of your products darken lead solder? Jax Pewter Black will darken lead solder. Category: Specific Looks and MaterialsIf you like this, share it Post navigationPrevious post: Do you have a chemical that can remove your green patina that was applied about 3 years ago?Next post: Does Jax Green Patina work on lead solder?