[Remod]

I do garage floors for a living, and I hear stories all day long about failed DIY floor coatings. The reason most fail is the prep work, or more specifically, the lack of prep work.

We use a diamond carbide floor grinder and remove about 1/16" of surface to physically remove stains, wavy finish work, pitting, etc. By using that method, we avoid adding moisture to the concrete, which is what happens when you acid etch a floor. The grinding and blasting also removes small fractures which eventually become pitting and spalling. A shot blaster does virtually the same thing, but results in a more uneven surface.

Our professional coatings are also superior to a cheap homeowner product, but IMHO its the prep that really makes the finish last.

Good luck with your floor.