Primer is essential for certain surfaces, especially when covering stains, dark colors, or bare drywall. It helps paint stick better and last longer. In many pro painting jobs, primer is non-negotiable because it creates a solid base for a smooth, vibrant finish. Skipping this step can lead to blotchy areas or peeling later. Professional painters evaluate your walls to determine whether primer is needed and which type to use. Their judgment ensures the best outcome, saving you money and effort in the long term. A quality paint job starts with a properly primed surface every time.