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Yes, you can grind concrete by hand, but it’s typically known as sanding concrete when done with a hand grinder. Additionally, you should only use this method if you’re working on a smaller area, like a countertop, rounding an edge, removing imperfections, or doing a spot repair versus a driveway or patio.

Yes, you can put thin pavers over a concrete driveway. However, it's always best to talk to a driveway installer before starting. You'll need to ensure that the concrete below is in good enough shape to hold the pavers and that the driveway will still meet local building codes.

Yes, you should seal your exposed aggregate concrete to keep it protected from the elements and reduce the risk of cracking and concrete spalling. You’ll need to invest in the cost of resealing your concrete about every three years to keep it in good condition. Unsealed exposed aggregate concrete is susceptible to water damage, stains, chips, cracks, and abrasion. Sealers are available in various finishes and levels of gloss. Outdoor exposed aggregate concrete should be sealed with a non-yellowing, UV-resistant sealer to preserve the look of the finish.

If your concrete stains are green in color, it indicates the presence of mold or algae—which you should address right away. If left unattended, mold will spread to other areas throughout the home. However, be careful not to disturb mold on indoor concrete surfaces and work with a local mold remediation specialist for specialized care. Once free from mold and algae, seal your concrete to eliminate pores and gaps.