Most materials react in some way to magnetic fields. However, most of these react so weakly that it can only be noticed under very controlled conditions.
The most common reaction to a magnetic field is a minuscule repelling force. These are the so called diamagnetic materials.
Then there are the paramagnetic materials that react with a minuscule attracting force.
Finally, we have the ferromagnetic materials such as iron that react with a strong attracting force.
This can all be explained with polarized zero-point photons being reflected by the materials involved.
In the case of diamagnetic materials, we have reflection in which the polarized photons are flipped around. This produces a repelling force.
In the case of paramagnetic and ferromagnetic materials, we have reflection in which the polarized photons are bounced back directly. There is no flipping around of polarity, and we get attraction as a result.
In the case of diamagnetic and paramagnetic materials, the effect is weak. There is a lot of scatter and little reflection. However, in the case of ferromagnetic materials, reflection is strong.
Unlike visible light, which reflects off of the outer surfaces of materials, zero-point photons reflect mostly off of the atoms inside the material.
Zero-point photons are very small compared to visible light. They typically tunnel into materials before interacting with it. There is no way to polish an outer surface to improve the magnetic properties of a material.