You are reading a single comment by @deleted and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@deleted
there are other chemicals in the mix as well as caustic. caustic will eat alloy (why it's used for stuck seatposts).
i can't see why they would go to the trouble of blacking axles/bolts etc in the same way as gun parts.
they wouldn't add something to the steel to colour it. all these finishes are basically oxide films with a slightly different chemical make up to vary the colour.