Hi Sorry I'm not good in physics at all. I have the following dust problem becoming attached to Nickel coatings. from what i know Nickel can become magnetic but aluminium should not be attracted to magnets. I did an experiment to confirm if the nickel coat is acting as magnet in which i used a regular clean magnet and aluminium foil and a very sharp knife. Cut small pieces of aluminium foil (less that hair thickness) with out touching them I clean the magnet with alcohol and let it dry. the i passed the magnet near the aluminium particles or touch them. if aluminium foil particles are small enough you can pick them with the magnet. the smaller particles are attached faster and you can even see the pull of the magnet when its getting near. I tryed also to pick the same particles with the knife, and they just dont get attached to the knife. DOES ANY ONE HAS AN EXPLANATION WHY ALUMINIUM PARTICLES GET ATTACHED TO THE MAGNET?