It is often difficult to paint over a dark-colored wall with a lighter color without multiple coats of paint. Dark colors tend to show through light-colored paint, especially if the new paint isn't specifically designed to cover dark surfaces. Using a primer can help provide a good base for the lighter color and may require fewer coats of paint, but it is still recommended to apply at least two coats of paint for best results. Additionally, the type and quality of the paint used can also affect the coverage and number of coats required.
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