It's possible to mimic the surface oxidation of antique brass objects by using the following techniques.
You will need
- Protective gear
- Brass object
- Hot water
- Salt water
- Heat source
- Commercial aging product
- Large plastic bag
- Expert (optional)
Step 1 Remove any varnish Remove any varnish from the surface of the object by applying acetone with a brush. Rinse off the acetone with hot water.
If you are not sure the object is made of brass – bronze and copper look similar – take it to an expert for an evaluation. Aging treatments that work for brass may damage other materials.
Step 2 Brush vinegar or salt water on the surface Brush vinegar or salt water over the entire surface of the object using the paintbrush. Both liquids oxidize the brass.
Step 3 Apply heat Apply heat or a flame to the object, which causes the brass object to take on an aged appearance relatively quickly.
Step 4 Use a commercial aging product Apply an over-the-counter aging product, though it may leave a color deposit on the object’s surface that wears off easily during normal use.
Step 5 Use ammonia Place the object in a large plastic bag next to a rag soaked in ammonia. Ammonia vapor produces a greenish-brown oxide finish on brass, close in color to a natural patina.
Brass is an alloy of copper and zinc.