Initially, I was planning on using porcelain tile for my garage. I purchased 1200 sq.ft of 12x12's for it. After the floor was poured, I realized that I would have to diamond grind the new floor because it was so smooth and I would also have to honor the cut lines. I didn't want to go through that and my parents are planning on tiling their basement so, they will get my tile. I decided to acid stain my floor. I used Legacy Industrial products. They were: hard trowel solution (3gals), Shifting Sands stain (5gals), Cola stain (1/2gals), HD6600M WB acrylic sealer (3gals). My floor is fairly new and didn't have any staining or damage. First step: clean floor using Simple Green degreaser with a power washer and nylon scrub brush:
Next step (after drying): Apply the hard trowel solution and allow to sit for 15 minutes:
I then power washed the solution off. I allowed the floor to dry for 2 days. I then applied the Shifting Sands stain. I sprayed the stain down in sections and brushed it in using a push broom to break the surface tension. After this, I sprayed a light coat of the stain to disperse the brush marks:
I allowed the Shifting Sands stain to sit for approximately one hour and then I applied several random spots of the Cola stain (mixed with water 1:1). I allowed the stain to work for approximately five hours. I then neutralized the stain using a solution of baking soda and water. I then power washed and scrubbed the floor five times to remove all of the residue.
This is what the floor looked like when dry:
I then allowed the floor to dry for almost three days. I then applied two coats of the sealer. First coat:
Second coat:
I am very happy with how the floor came out. This was my first time acid staining. I got some really funky effects with the stain. I was worried about the Matte sealer not showing the depth of the effects at first but, I was worrying about nothing. Thanks so much to Legacy Industrial for answering all of my PM's
!!
...
. We had the floor broken up and removed in one day. I rented an electric jack hammer from Home Depot and it worked great. The old slab was sitting on sand and no vapor barrier or lath was used. It varied in thickness from about 3" to 4 1/2". 
: So, I've pretty much given up on this idea. The plan now is to section off a part of the floor with expansion joints so that this area can be broken out at a later date. This area will be tucked under the stairs so, it wont be too bad.
.
Ignore the bulge, it doesn't have to be pretty, it will never be seen once the floor is in.
My stepfather had a crew that has done work for him in the past pour the floor (way above my capabilities). They did an awesome job. The back of the garage extending the length and out about 7ft is flat for placement of my workbenches. The floor then pitches toward the doors from there. I'm starting to see the light at the end of the tunnel 
