Recent content by koocarlos

  1. K

    How to colour/lacquer/paint hand engraved watch dials/guilloche

    thanks for sharing
  2. K

    airtact Handpiece not running smooth

    hi marters, this is Carlos Koo from HONG KONG, i use GRS tools. i'm happy with my GraverMach® AT and 901 airtact handpiece for the past 2 years. recently i found my handpiece not running smooth and kinda..... intermittent. The power keep dropping when i'm cutting the metal and i needa raise up...
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