Angier,

 

I built a hangar in Texas a couple of years ago and applied two Grey Epoxy and one Clear Polyurethane coatings.  I had planned to do it all myself but it turned out to be more labor intensive than I thought.  After doing the acid etch myself I hired two Foreign Exchange Students to roll on the coatings to the 3600 sq. ft. floor while I cut in the edges with a brush and mixed the material.

 

Material and tools cost about $3,300, labor about $300, figure 5 to 7 working days.  The upside is a beautiful floor that is super easy and quick to clean with an industrial size dust mop.  It does not tire spot and spills just wipe up.  Downside is, it is slicker than ice when wet.  A friend added the recommended size sand with no noticeable improvement. 

 

I bought it from a company in Arkansas that has advertised in Trade a Plane for many years (I can look them up for you).  They also sell tools and include instructions.  Call me if you want to talk about it.

 

Steve Colwell  in CA for a few months  916 505-6099