Is ionization rustproofing effective?
Answer from Auto123.com
Ionization rustproofing is not effective. For the module that creates the magnetic field to be functional, the car must be placed or submerged in water. This type of antirust works for boats, but not for cars. These antirust system dealers have even been prosecuted in the past for false pretenses. Moreover, these systems are known to drain batteries. For maintenance, it usually covers the hole, but not rust. To date, nothing beats oil or grease.