Rust Converter, Which product is the most reliable?

Hello everyone,
Today, I'm reaching out to you with a concern that's been bothering me. I recently purchased a product rust coverter that promised spectacular results, but unfortunately, I'm deeply disappointed with its inefficiency.
I followed the instructions diligently, but the results are far from satisfactory. I'm wondering if anyone else has used this product and encountered the same issue. If so, I would be grateful if you could share your experience and perhaps provide advice on what steps to take.
Additionally, if you have any recommended alternatives, proven products, I'm all ears.
Thank you in advance for your valuable assistance!
Cajul