I had a thread on this thing. Aside from rust-o-mizer, there was the original one: "Rust Evader" from the US... then there's the "rust defender", and the local versions "Rust Invader", and the "Rustpoof your car with just 1 (or 2) wires systems"...

Rust Evader in the US got sued. Apparently, the technology doesnt work for cars. It does for boats and underground pipes, but not cars.

I still recall the rust evader booth in the transshow so many years ago: The display unit of Rust Evader showed 2 pieces of metal submerged in salt water. The metal connected to the device had almost no rust while the one which wasnt connected was fully corroded.

A scientist who did studies on the system concluded that itl work if the metal is always underwater (such as the ones in the display model), but since cars arent always under water, it doesnt work. Look up "Rust Evader" in google to find out more regarding this.

Anyway, all other electronic devices which came out after look like rust evader immitations/rip-offs. Their principles are the same, and often sound like they were copied directly from the rust evader literature.

My friend's tita installed one of the local versions on her liteace. When nabangga yung car, rust immediately formed on the bumped part. It made me lose faith in the technology.

For this reason, Rust Evader had to transfer their market outside the US.