Do you need to sand before priming?

Do you need to sand before priming? Whether you’re priming a porous substance such as wood or a smooth substance such as metal, you need to sand the substance beforehand. Sanding a surface removes the top glossy layer, allowing the substance to receive the primer.

Whether you’re priming a porous substance such as wood or a smooth substance such as metal, you need to sand the substance beforehand. Sanding a surface removes the top glossy layer, allowing the substance to receive the primer.