I have a car with surface rust in the engine compartment , the vehicle sat with no hood. Its a Vega and I want to eliminate all rust and paint. I plan on using por 15 and a black top coat.

I want to take the front subframe and inner panels off and was thinking of getting a small swimming pool and putting the parts in there for the rust removal. I seen this process on TV but forgot what chemical is needed. I know it was something simple you could get from Home Depot. Then add water and the electrical charge and a couple days later the rust was removed. Anyone know the process?