rally-chris said:
Yes - get yourself some self levelling screed. This is usually a relatively quick drying plasticised cement that will smooth out lumps and bumps and give you a much smoother and less dusty surface than raw concrete. You have to mix it with water as then spread it out with a trowel or straight edge and then it levels itself out.
Chris
Is there a minimum thickness that this needs to be put down to stop it breaking up?
If it needed to be put down an inch thick it would create a bump going in and out of the garage and possibly give me a problem with the garage door.