Concrete resurfacing is much less expensive that removing all of the old concrete and starting fresh. Keep in mind that not all concrete can be resurfaced, that a thin resurfacing needs to bond to the existing surface. Surfacing with a polymer coating may be a better idea, depending on the surface being resurfaced.
Tip #1: Remove Broken Concrete
Before you begin any concrete resurfacing, you should remove badly damaged areas. If you resurface cracked and broken concrete, the chances are good that the resurfacing will not last. Fix all areas in need of repair before you begin to work on concrete.
Tip #2: Bonding Agents
When you resurface concrete, it is important to add bonding agent to the mix so that it will adhere to the existing surface. You can find bonding agent at most stores that sell masonry supplies. The agent is usually available in gallon containers. Typically, a bonding agent looks very similar to Elmer's glue, and only about half a cup is required for each bag of concrete mix you use.
Tip #3: Polymer Coatings
For concrete flooring, it may be preferable to use a polymer coating. This type of resurfacing is usually poured on in a liquid form and smoothed out over the existing surface. The coating is able to penetrate holes and gaps in the concrete, providing a smooth, level finish. As the coating dries, with the result being comparable to a lacquer applied to concrete.