If you have a big concrete surface that needs to be worked on, such as if you need to remove the top layer of resin, if you need to add a new coating overtop, you need to even out bumps, or anything else of the sort, then two options you have at your disposal are to use a concrete grinder or a concrete scarifier.
Now, these two tools are similar in the sense that they are used to remove concrete from a surface, but they are actually fairly different tools, especially in terms of their functions and what they excel at.
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