Cleaning white landscape rock to like-new condition
Problem: I want to re-do my landscaping, but want to re-use the existing rock. The old rock has gotten brown and yellow stains on the bottom - can I clean it? TL;DR: No, you can't. As far as I can tell, the rock is called "Crystal White". Mine looks to be about 1" / 25mm size. Over time, it develops brown and/or yellow "staining" on the bottom. This is likely due to oxidation. This means taking up and re-laying down the same rock doesn't work, since half the rock will be discolored instead of nice and white. As this rock is hard to find and potentially expensive, I wanted to re-use the same rock instead of throwing it away. It may seem obvious that you can - or can't. Some people report success in "cleaning" their rock. I tried the following materials to eliminate the discolorations: Barkeepers Friend (oxalic acid) Stainless Steel cleaner TSP (premixed / ready-to-use) CLR (straight) Palmolive dish detergent Glass cleaner (ammon...