My garden-facing veranda had not received attention in several years, so I decided to paint parts of it this summer. The difference is noticeable. It is not so much the visual appearance, the freshly painted parts do not look much different from the older parts. It is its reaction to rain that fascinates me.
Where the paint is old, the water permeates the wood. Where the paint is new, the water stays on the wood longer. Look at the picture. To the left you see the area that was painted this summer: the water is clearly visible. To the right is the older part that does not exhibit a lot of water after rainfall.