For outdoor murals, I use oil-based paints to ensure they withstand rain. By mixing five base colors in different quantities, I can create a wide range of hues. These paints can be challenging to clean up, so I recommend using a paint thinner. Odorless paint thinner is particularly useful for cleaning up while indoors. Additionally, consider investing in cheap disposable gloves for easy clean-up. You can choose any type of finish depending on your desired look, but I’ve found that a semi-gloss finish works particularly well.