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Using primer on already painted walls is not always necessary, but it can help improve the adhesion of new paint and provide a more even finish. If the existing paint is in good condition and you are using a similar type of paint, you may be able to skip the primer. However, if the walls are in poor condition, have a glossy finish, or you are changing the type of paint, using a primer is recommended for better results.

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Q: Do I need to use primer on already painted walls?
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