Stamp and Seal the Concrete
While the concrete is still somewhat wet, use a rubber stamp (Image 1) and a tamping tool to stamp a pattern into the concrete. Make sure not to put too much pressure on the damp concrete (Image 2). Once the concrete is stamped, let it dry completely overnight.
After the concrete is completely dry, sweep off any loose color hardener and pressure-wash the concrete. Carefully remove the forms with a hammer or pry bar. Use a paint roller to apply a coat of high-gloss concrete sealer. Let the sealer dry completely.