I recommend NOT using car wax.
Car waxes are formulated for waxing auto paint, not wood.
Car wax is often used in some industries as a human-safe cleaner for machinery and it can attack wood finishes and some plastics.
A far better option is to buy a can of Johnson's Paste Wax.
This was invented specifically for wood, but works on metal and other materials.
You can buy big yellow cans at most Walmarts, hardware stores, and some grocery stores.
Unlike car wax, Johnson's doesn't dry to a white coating. Use car wax on wood that doesn't have the grain totally filled and you get what looks like white scratches all over it where the wax dried in the grain.