All pieces come polished and waxed, however it is natural for the solder lines to oxidize over time. You can wax your piece periodically to restore it's shine by using carnauba wax and a soft cloth. Avoid using harsh chemicals or alcohols.
Stained glass pieces contain lead. This poses little harm, but be sure to wash your hands after handling your piece.
I recommend pieces be hung by a nail or screw-in hooks. Suction cups can be unreliable. If you want the chain longer on any piece, I will be happy to oblige! Just add a message during checkout.