Can suction cups be applied to painted surfaces?

Suction cups can be applied to painted surfaces, but their effectiveness depends on the type and condition of the paint. Smooth, non-porous finishes are best for creating a strong seal, while textured or porous paints may reduce suction and cause the cups to fall off. Additionally, if the paint is old or compromised, the suction cup might damage the surface when removed. It's advisable to test on a small area first to ensure no harm is done.