Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to quickly and easily clean rims [title] Determine what type of wheel you have. [step] There are a number of different types of rims you may have on your vehicle. It's important to determine what material your rims are made of so you can buy a cleaner designed for that type of wheel.

Ending1: If you are unsure what type of wheels your vehicle came with, refer to the owner's manual for guidance. [substeps] Steel wheels are often black and covered with hubcaps. Ending2: Wheels that are made from aluminum, titanium, or other very hard tempered materials often will not be well cleaned. [substeps] You must first clean the wheel outside the car. Ending3: [substeps] Ovals are more durable than wheels of other shapes. Ovals are more dense and withstand more stress, so make sure to measure and mark your wheels before you buy your rims. Ending4: Apply a wheel cleaner on both wheels for this purpose. [substeps] Chrome-type rims are the most common, but are rarer, so you may find a lot of it on this type of wheel.

Answer format: ending1/ending2/ending3/ending4