My dad has a big CNC and the old room was needed for a different purpose, and so a new room was made available to fit the CNC more comfortably, as its size was reduced in the old room. I helped him prepare the floor, pour the epoxy and spread it even.
First I cleared any and all debris left from the previous job of pouring the concrete pad, then I sanded it. After that came the epoxy, and we finished quickly. After a few days the floor was completely level, and off course, extremely strong and durable, why wouldn’t it be?
Today the CNC has its own place to work, it only has to be assembled of what is missing.