Yes you need high magnetic fields to re-magnetize a magnet. Seems like you need between 1 - 2T magnetic field to saturate a rare-Earth magnet. So it's not somet

Yes you need high magnetic fields to re-magnetize a magnet. Seems like you need between 1 - 2T magnetic field to saturate a rare-Earth magnet. So it's not something easily achievable in a homemade setup.