Use any good brand of silver polish, and a very soft cloth. It will be impossible to get into all the fine details; don't try to. Rub softly until the cruet is clean. Wash with distilled water, and put in a bag with 3M silver preservative strips.
To polish an old silver dish you should buy a good silver polish and rub it with a non-abrasive material. Silver can de delicatie so be careful!
By making use of the abrasive polish, you will be able to remove the polish residue. After the old silver polish residue has been removed, its polishing is very important.
You should never polish a silver dollar or any old coin. Any standard silver polish you have at home will damage the coin's surface and reduce its value.
You should never polish old coins, even if they have turned dark or black.
Silver plated or sterling silver. ?? I'm not even sure which it is. Should there be a mark to indicate sterling silver?
To remove nail polish from sterling silver without damaging the silver, you can try using a mild silver polish or a jewelry cleaning cloth specifically designed for silver. Avoid using harsh chemicals or abrasive materials that could scratch the silver. Gently polish the nail polish off in a circular motion until it is completely removed.
wash it in silver water! You could polish it.
It is called a cruet.
There is a very good chance that it could be valuable depending on the price of silver right now - what you probably should do is take the antique silver cruet to your local diamond dealer and ask for an appraisal of the antique. They should be able to give you a reasonable estimate of the value and then they may even offer to purchase the item from you.
Only use special silver polish - other substances can seriously damage your silver. Since silver can be easily scratched, it's best to apply the polish to 100% cotton balls or and old toothbrush with softened bristles. There's more detailed information in the article below.
The best way is to get gray nal polish and white nail polish. then add fine silver glitter and let it sit.
"Antique" in the trade means "over 100 years old." A good place to start would be ebay. Expect to pay a considerable amount for a certified antique with a written provenance, since silver cruets are uncommon - most are glass.