We always enjoy seeing our products being modified, revamped and DIY-ed, as well as the results of these transformations.
Our customer Vera Kark provided us with some thoughtful feedback on adding mechanical tweaks to improve our Solar GraviTrack build and documentation. She also painted the brown MDF of the machine. She used tempera paint on the wood components still in panelized form, and the GraviTrack's performance seemed to be unaffected.
The GraviTrack looks great in vibrant jewel tone colours, however, we do not recommend applying paint to the hand mechanism itself. You can paint the base and the rails, avoiding the hand mechanism completely. The moisture and the thickness of the paint might affect the precise tolerances of the moving parts, and will interfere with its proper functioning. Another relatively safe option might be felt tip marker since the moisture from alcohol evaporates quickly.
Photos & video by Vera Kark
P.S. Also, a particularly bad idea is painting your GraviTrack after the assembly is completed. Even though we were using a very watered down acrylic paint, the mechanism seized up the moment the paint became sticky. Don't be like us. Take care of your GraviTrack.
A portrait of a sad stuck GraviTrack