Try to add some details to the post Dents from bubbles during production Side seam Connections look a bit flimsy. I would add dead insects. Usually there are a lot of them. Move dirt to the lowest part. Raindrops hit sides more often and with higher energy. Also drops lose their velocity as they go down the spherical…
Maybe not eliminate completely, but look up more references. Usually these things cover narrower parts first. For example: between the column and the pipe/lamp. I guess, after that they would move on more open areas, but just putting a web in the open seems to take away from realism a bit. Aside from that, and the part…