I got a friend's guitar here. by the serial number it's a 2009/2010 Standard Tele. I can tell some electronics mods have been done because there's CTS pots in there. Whether the pickups are original I have no idea. I've been experimenting a lot with flipping magnet polarities lately with some strong neo magnets and a gauss meter. But so far I've only flipped Alnico 2/3/5 and I'm a bit afraid to play with these magnets if they're ceramic in case I degauss them and can't get them re-gaussed. So I thought MIM pickups were always ceramic, but the pickups in this tele are showing rust on top, and correct me if I'm wrong but I thought ceramic magnets wouldn't rust. They also show a lowish Gauss reading -- about 450 to 600G which I would think they are Alnico 3. Can ceramics be gaussed as low as this?