Cosmetic neodymium magnet is used in below area:
Packing button, like perfume, lipstick, people use a pairs of 4 or 8 multipoles magnetized ring NdFeB magnets, when rotate the pipe, magnetic force can separate/attract another part.
Usually these magnets are designed by N35 grade.
Typical sizes are D23xD19x2.5 mm, D26.8xD19.8x2.5 mm;
The coatings we can supply are very wide, Zn, Ni, NiCuNi, chemical Ni, NiSn, epoxy, parylene, PTFE, Everlube, MoS2, different coating support your magnets work stable in different environment, we have some solutions for those difficult situation, as wet, hot, moisture, acid, etc.