The front disc bolts are specials, so I’ve gone for the zinc plating option rather than stainless. The locktabs, too, have been zinc plated. On a bike as popular as the Kettle, things like disc locktabs will still be easily available new but, as the old ones were still serviceable, it was easy to include them in a job lot for zinc plating. If you’re working on a very rare bike, replating may be your only option, but make sure you use a plater who won’t lose anything