If it is really an antique, that is, valuable, bring it to an expert. Doing all the right things in the wrong way or wrong order could cause irreparable damage to the painting and to its value.
Vinegar.
Antique paintings are very beautiful, but sometimes expensive. there are a lot of good websites to look at. One might be www.antique-fine-art.com. Good luck!
You can clean an antique copper faucet. However, you may not want to. If you clean the piece it could lose its patina which takes away from its value. If you do clean it, use soap and water and be gentle.
The value of an antique oil painting can vary greatly depending on factors such as the artist, condition, provenance, and current market demand. It is recommended to consult with an appraiser or art expert to determine the specific value of a particular painting.
You did not state what the sculpture was made from. This would determine how you clean it.
It depends on the painting. If it is done by a famous painter, it could cost millions. However, you should be able to find relatively inexpensive antique paintings at an antique dealer.
There are various different kinds of outlets that supply the customer with good antique oil paintings. For example, etsy, selling antiques, europic art, online galleries and ruby lane.
You would want to hire a professional to clean the painting after having it appraised to be certain it is the real thing.
There are several methods available to clean antique crystal decanters. Avoid putting them in the dishwasher, instead, use a mixture of 1 cup vinegar to 1 quart warm water to safely clean the decanters.
Antique lockets are delicate and require special cleaning techniques and procedures. A person can clean an antique locket safely and effectively by using a mixture of baking soda and water. A person can use a sponge dipped in the baking soda and water solution to softly rub the antique locket then let it air dry.
To clean antique diamond jewelry you can presoak or rinse the jewelry to remove any losse dirt. Then you can use a cleaning solution and a gentle brush to remove any remaining particles.
To clean antique glass use a soft cloth and room temperature water. Line your sink with a towel to help prevent breakage. If the piece is very dirty, you can add some dish detergent to the water.