Doing it by hand with sandpaper is a nonstarter.
Also I don’t have a lathe :-/

  • AMillionMonkeys@lemmy.worldOP
    link
    fedilink
    arrow-up
    3
    ·
    1 year ago

    I’ve actually tried this! The problem is that the sandpaper is too thick to bend neatly in that tight a radius. Maybe I could buy raw grit and stick it in the cavity with spray adhesive…

    • Ugly Bob@lemmy.world
      link
      fedilink
      arrow-up
      5
      arrow-down
      1
      ·
      1 year ago

      You don’t want the whole hemispherical cup. Just a semi circle.

      The best and traditional tool for the job is a rasp. I recommend a Shinto rasp. Surprisingly fast and easy to use.

      • The_Pete@lemmy.world
        link
        fedilink
        arrow-up
        2
        ·
        1 year ago

        can confirm, I have a rasp (Shinto) and I can throw a 1/4 or 3/8 quarter round on an 8 foot edge before you can get your router set up.