Hello, I tried using an old DIY book for instructions on how to do a paver patio, and the instructions I followed said to fill the gaps between the pavers with a mixture of portland cement and sand. Apparently, everyone has (since the publishing of this book) realized that polymer sand is a much better idea. I didn't find out about this until I stained my whole patio with the portland cement, and now I'm trying to figure out how to remove the stuff.Currently, I have a big bottle of ZEP Driveway and Concrete Cleaner, and I'm trying to do a few passes of scrubbing the surface down with that, but I haven't seen much of an effect, yet.The stain is mostly just apparent as most of the pavers being a lighter shade than they're supposed to be, but it's fairly obvious, and the wife is displeased. Any help is greatly appreciated. via /r/DIY http://bit.ly/2IZinmN
