I read with interest the project for resurfacing a concrete driveway. I have a slightly more complicated problem. My garage floor has sunk at both walls and cracked in the middle. About 15 years ago I had the sides mudjacked -- the guy took them as high as he could but I still have a about a 2-3" drop from the center to the sides. Water stands in puddles near the garage door. I want to level the floor with a pitch toward the garage door so the winter melt from the cars has a chance of flowing out the door. I live in Madison, WI so the temps in winter run to -15F or worse. This is a two car garage. What is the best way to go about leveling the floor? Are the polymer products out there capable of surviving winter, especially the thin edges? What is best product to use? And finally, if I get the floor leveled, should I then epoxy paint it? Or put a rolled rubber membrane down? Both? Oh, I can't rip up the floor because there is a bathroom built out over part of it (it should be a 2 1/2 car garage). Thank everyone for whatever help you can give.