Last week I had a great customer with a great car for an interior detailing: Porsche 911 996 Turbo. While waiting for Leatherique Rejuvinator Oil to penetrate the leather, seeing that exhaust tips are a little dirty , I said to do a test between two products: Zymol Metal & P21S Multi Surface Finish Restorer. I have not used any of these products before, so it was a good opportunity to test them. Zymol Metal: Packaging is a beautiful, worthy of the name Zymol. Zymol Metal content consists of two towels, a pair of protective gloves and a towel for wiping. As you can see in the picture, those two orange napkins are napkins impregnated with metal Zymol solution. P21S Multi-Surface Finish Restorer: P21S comes packaged in a metal container is a simple package. And now to work. I chose the right tip to clean it with Zymol Metal, and on the left for P21S Multi-Surface Finish Restorer. Right tip before applying Zymol Metal: Right tip after cleaning with Zymol Metal: Left tip before treatment with P21S: Left tip after treatment with P21S: Conclusion: - Although I'm a hardcore fan of the brand Zymol, Zymol Metal product not worth the money (31.5 EUR in Europe). P21S is much cheaper, somewhere around 10 EUR. - P21S tube reaches more than 2 applications Zymol Metal napkins. - Cleaning power is much higher at P21S than the Zymol Metal. In the near future, I will test between P21S Multi-Surface Finish Restorer and Meguiar's Metal Polish. Thanks for your attention!