Review on 💎 Optimum (21700) MDR Mineral Deposit Removal - Gentle & Effective Solution, 8 oz. by Derek Pape

I bought this because I was out of town and forgot to turn off my sprinklers so my car was covered in lots of hard water and deep water Etching. This didn't remove the deposits at all and had to resort to wet sanding with fine grit sandpaper, a buffing pad and a light polish. Keep in mind my car was covered in multiple layers of ceramic so this could make removing mineral deposits difficult or why this product didn't work. I'm going to apply this to my daily driving car and let you all know that it works on non-ceramic vehicles. I can't highly recommend this product yet, and without buffing you're going to be using a lot of elbow grease for results that aren't up to the level of traditional color grading. That stuff didn't work on my windshield either.