Hi Supranatural,
Just disassemble and clean on a regular basis. I like to use a light CLP to clean and wipe it off prior to reassembly.
You can use a cold bluing on your mag body if you want. IMO, unless you live near the ocean or neglect them it probably is not necessary.
Wipe the tubes down the same as above.
In the north here, if I won't be using the pistol/mags for months I just disassemble & wipe everything down to leave some CLP present. Store them in safe with humidity controls.