Fill a large cooking pot with 1 quart of water and 1 tablespoon of baking soda. Put the pot on a stove top and bring it to a boil.
Grasp the lantern with tongs and dip it into the boiling solution. Boil the lantern for 15 minutes.
Remove the lantern and rinse it under hot running water.
Moisten a cotton cloth with acetone. Rub the lantern with the cloth. This process removes the lacquer. You don’t have to do this for lanterns made of stainless steel or other bare metals.
Mix one part antiquing solution with 10 parts room temperature water in a plastic bucket.
Dip the lantern in the solution and agitate it until bubbles form. The color of the liquid will change, which is normal. Keep the lantern submerged until it turns the color you want.
Remove the lantern and rinse under hot running water to stop the antiquing process.
Rub the lantern with a sponge to even out any dark spots.