I have a large retaining wall at the front of my house. It is constructed of 85lb burgundy decorative cement blocks. My problem is that some of the block have become faded over time and they are a real eye sore. They have a whitish tint to them now and really look old. My question is do they make something to help return the color back to new, like a tint or dye that I could put on the surface to bring them back to life. Or will I be forced to replace the blocks with new ones. I have done a lot of searching but haven't been able to find an answer. Can anyone please help me. Thanks so much!!!