Unfortunately, I did not take pictures of the weathering process... just the after shots. But I'd be happy to describe the weathering process. Next time, I'll try to remember to photograph the process for a better guide.
For the spinner, after the spiral was painted, I gave it a clear gloss coat. A brown pastel wash was applied to the recessed details. A lighter brown is good here since it will provide contrast with both the white and the black. A flat coat was applied to seal the wash. Some chipping was done with colored pencils. I like chipping with multiple colors as this gives a nice worn/dirty effect. For the spinner I used silver on the black portions, standard graphite pencil on the white portions and a little bit of brown all over. The chipping effects of the pencils are not very permanent and will be altered by repeated handling. I don't mind this and will simply "refresh" the chipping at the end.
At this point, I wanted to try some dry pigments. I taped off the back half of the spinner at the panel line and applied an ochre pigment along the tape line. Using a stiff, flat paint brush, I blended the pigment in, always working back to front parallel to the airflow. After this was done, I taped off the front half of the spinner and did the same but worked the pigment front to back. This gave the spinner an overall ochre tint that I thought was a bit heavy. So I brushed the paint brush back and forth to try and reduce the effect which didn't do much. So I wet the brush slightly and brushed it back and forth, which gave a nice subtle streaking effect.