Oh god! Magnetizing Mechs... I do this in a limited fashion with the old RAFM Heavy Gear miniatures (pretty big) and Warhammer 40k. With the 40k I went a bit overboard with magnetizing, now whenever you place them a little close together or someone bumps the table, it'll end up in a big pile of Terminators, all stuck together...
It looks good though, but not going to copy you, NOWAY! *looks at the pile of magnets* Maybe... ;-)