I've had a little experience with floor coatings. They are great but, unless you get the concrete PERFECTLY clean, you may have issues with peeling on whatever coating you put down. Have you looked into a rubberized tile? I don't know what the cost difference is but going through all that surface prep only to have the coating peel up really sucks.
Just something to consider. Your garage looks great!
Kooks 1-7/8 LTs; Calico coated w/HFCs, Solo Mach XL catback w/J-pipes, VMax TB, C.A.I. Intake, JRE Tune, RX Catch-Can