You will need to use a polymer-modified cement repair designed for overlays or resurfacing if you want to try and buff it to a sheen. Pay attention to how thick they can be applied (you may need two applications if the repair area is thick) and the cure rates based on how thick the repair is. You won’t be able to get much of a sheen if it’s not fully cured all of the way.

When they poured the concrete for my garages, there is a thin layer of concrete around the edge of the drain pit. Over the years, this layer has chipped away and I need to redo the finish around the pit. In some places I will need to apply filler and in others I will need to buffer.

Cracks should always be filled with a 100% solids epoxy or polyurea crack repair filler. Concrete does not peel, so what is it that is peeling around the drains?

Perfect! Thank you very much! For filling small cracks and making some repairs around my floor drains, what do you recommend? Around the floor drains, I have some peeling parts and I would like to fill them and buff them later to create a nice edge.

You can’t apply the 8510 if you want to use the HD40. It will effectively block the HD40 from adhering to the concrete. However, you can still apply the 4500 to densify the concrete. This will harden the surface and help HD40 to provide a good shine when you buff it.