Unable to paint a component in Sketchup

As you can see in the model I have painted 3 pillars but the paint bucket does not work on the 4th pillar. Please help me understand what I am doing wrong. Thanks!
Playhouse.skp (6.2 MB)


you have 4 pillars in that very same place. and if you select one of these components, you’ll see in the instructor you have 7 of them in your model, although only 4 are visible.

Delete 3 of them and you won’t have those overlapping objects that make it impossible to show the correct texture.

Also, remember that instead of painting these components individually, you can edit one of them (twice - because I see you created a component inside the component), paint faces, and all the other identical components will be painted too