TrendTok Hub on Instagram: "The post features a 62-second video of a CNC lathe using a carbide insert to machine rust off a heavily corroded threaded metal rod, progressively revealing clean, shiny threads through precise cutting. Released on November 27, 2025, by Indonesian user @zeyzoeye , it quickly amassed 902,000 views and 943 likes, sparking mostly Indonesian replies questioning the process or suggesting simpler alternatives like buying new parts. This subtractive technique effectively res