I’ve been making jewelry accessories for the past 10 years and one
of the things that I’ve learned is that the client/customer, KNOWS
whether or not they have an allergy or sensitivity to metals, and
which ones. A happy, educated customer will be a repeat customer. So,
why the interesting in spraying earwires with lacquer?
Coatings such as lacquer will eventually wear/peel off. Waxes will
Then the piece will tarnish in spotty places. This makes sterling
(which is not cheap as you know) look like base metal. Again, not
something you want.
Your problem is to avoid tarnish on sterling earwires. Keep them out
of the air whenever possible. This means either storing in plastic
baggies with the silicone absorbent packs or small pieces of tarnish
resist papers. Air is the enemy! Spraying them with anything is
asking for trouble later. If your pieces are tarnishing out on
display, a few swipes with a polishing cloth will remove tarnish
quickly and efficiently.