Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to paint a concrete wall [title] Choose paint for your project. [substeps] Select paint appropriate for your outdoor project. You will need a paint that is resistant to moisture and sun exposure.

Ending1: Because the concrete will be dry, it is best to take it outside to a sunny place. Wear proper safety gear to protect yourself against the elements, especially if you plan to paint trees, shrubs, rivers, or fields. Ending2: [title] Unplug the wall and pour in shellac and vinyl primer. [step] Don't go overboard with shellac. Ending3: Outdoor concrete paint is available for outdoor projects. However, an oil-based paint also may work for your needs. Ending4: Check the label on the paint you use to assess the cost and/or painting time. Pick paint based on the type of project you will be painting.

Answer format: ending1/ending2/ending3/ending4