NM2.....
Pick one manufacture and go with their complete system.
In my case I choose Tnemec. The section of my floor shown here is 865 sq ft. I used their products back in the 80's with great success is why I went that route. On the system I used it has "traction" with chips but the clear coat shines. 40mils total. Be sure to grind to floor. Take your time, do it right.
100% solids system.
The coating I used as follows:
1) Concrete Floors (Shop and Machine Area) (Decorative Flake Floor)
Surface Preparation: ICRI-CSP3. This is the scarification of the concrete to remove all poorly adhered laitance on the surface of the concrete and to provide a surface profile (I used a 7inch hand diamond grinder).
The floor was clean and dry prior to coating. I Filled all control joints with Series 215 Surfacing Epoxy.
1st Coat: Series 201 Epoxoprime applied at – 12.0 dry mils
2nd Coat: Series 237 Power-Tread in 33GR Gray applied at 12.0 dry mils. While the coating is wet, broadcast random decorative flakes into the wet coating. (20 lbs)
3rd Coat: Series 284 Deco-Clear applied at 12.0 dry mils
4th Coat: Series 248 Everthane clear applied at 2.0 – 3. Dry mils
The application guide can be found here >
http://www.tnemec.com/product/stratashield/ You can get data sheets for coverage also.
Shawn