Pusaka, nice to hear from you again.
My opinion is this - spirit is not a piece of iron and i don't think magnetic attraction will make any difference...unless you believe it wll. Maybe i do.
When enbuing an object with spirit, the best material to use is the one the best makes some sort of logical sense in the hardwiring of your brain. Spiritual and magickal practices are very personal ones and while we are all influenced by larger cultural concerns what we each believe can sometimes be very specific (and somewhat different from our fellows). Personally i like the concept of the magnet as a metaphor for my mind and i always regularly reinforce the magnetic fields of all my keris. But i don't think it is "science" per se. I would never suggest that anyone else should do this, it is just part of my personal practice and something which works well with the software already input into my mind. But someone else may have an old hatpin from their favorite weird great aunt that has deep magickal significance to them that they might feel is the perfect material to embue and hold spirit. Maybe they want to melt it down and put it in their keris.
