Yes, surface preparation is critical for a lasting finish. Walls must be cleaned, repaired, and primed before any paint goes on. Skipping these steps can lead to peeling, bubbling, or uneven texture. A professional painter understands that proper prep ensures paint adheres correctly and lasts longer. They check for cracks, sand rough areas, and remove old paint if needed. These steps take time, but they make all the difference in quality and durability. Hiring someone with experience means fewer issues down the road and a more polished, professional result you can rely on for years.