I recently acquired some nice looking goblets from a thrift shop. The exterior is made of some shiny silver metal, possibly tin. The interior of the goblets is plated in a light-colored orange-ish shiny metal. I would guess that it's probably copper, bronze or brass. There's some fairly severe corrosion at the base of the interior one of the goblets where the underlying metal shows through. The other goblet has very very light corrosion (Two tiny black specks)
As I'm not sure what the underlying metal is, and I doubt that corroded metal is good for me, is there any way of re-coating the interior of the goblet(s) in something non-toxic? I'm not overly concerned about appearance. Mostly just making the goblets safe to use.
EDIT: Sorry for the massive images. If there's any way in BBCode to reduce image size, or hide it in a spoiler type thing, please let me know.
IMAGE 1: The heavily corroded goblet.
IMAGE 2: The lightly corroded goblet.
IMAGE 3: Both goblets, side view