x2.

You can buy aftermarket drain plugs with magnets that attract said metals. As far as the filter is concerned I would be hesitant to clog parts of the filter you do not want to clog for flow aspects. But I have not torn one apart to see just how they filter nor am I even sure you would collect enough metal to even do such a thing. I think you are reaching for a fix to something that is not broken. Attach magnetic drain plug, change oil when needed...or sooner if it makes you happy. Done.

You won't need to wipe anything off because the particles will be inside the used oil filter that you are taking off and throwing it away.
Then you just place the magnets on the new oil filter and the cycle starts all over again. You just move the magnets, no wiping anything, except to clean road gunk from the magnets before you place them on the new filter.