My students have been working on anodizing in their Industrial Processes course. They finished a lot of samples a few weeks ago and I just got around to documenting them. I'm really impressed with the variation of techniques (using resists) that they were able to achieve. The aluminum etching that I showed them using Home Depot root kill (copper sulphate) and salt really turned out well on several of the samples. They were also required to texture a few of their samples before hand too, so those are always impressive when combined with a colored surface. I asked the students to leave two of their 20 samples for the studio display board, so we will have quite the collection for the future. I'm planning on doing a few more anodizing workshops in the near future, so it will be great to combine this collection of samples with what I already have to share.