nostr:npub1v7t4yx9vxtv3mat0hdsduuym4fvjd5dzmdlh82ssa40phr965h2s2lck6k hi, yes it will spark. no lube needed. any grease or oil or paint on the metal will just burn off when you cut it. you'll see the metal does get very hot (melts in fact right at the cutting surface)