First off im sorry for asking this question , as im sure im way off base. I collect high end pocket knives and some of the blades have become a little magnetized; so i found a demagnetizer that uses NdFeB30 magnets, which are rare earth? MY question is this, if i rub the demagnetiser over the blade will it get rid of all magnetism, but could it induce any radioactivity into the blade. Also is neodymium or boron radioactive? Thanks for the help, i just didnt want to walk around with a radioactive pocketknife. P.s Yes i do have a little OCD about radioactive material and radiation.