On BBC Sky at Night TV show a few months ago, they collected micro-meteorites from roof collection at the Norman Lockyer Observatory in Sidmouth, UK. Rhys and I ordered some neodychromium magnetd and today we mounted them on a piece of spare wood using some small screws through their central holes. We put the wood and magnets, magnet side down, in the guttering on the front of our house in Lichfield, UK.
Hopefully, this will extra small metallic debris from the water running off the roof when it rains over the next few months. Again hopefully some of this will turn out to be micro-meteorites.
Andy and Rhys