I want to simply disolve rust in old motorcycle tanks. I often use electrolysis, but would love to just pour something in, let it sit, shake it around and pour it out. Which product is better suited for this, your Rust Disolver product or Fast Etch? Plus which product is best suited for disolving rust on old motorcycle hardware (nuts, bolts, brackets) including some that is chrome plated. In all cases, I would probably let the hardware soak in the solution. Thanks!!