I need help figuring out how to add a thin overlay onto a concrete pad without changing the height. I’m a volunteer on a community project to replace the dilapidated gazebo in our town square. We’ve come up with a design that involves enlarging the existing concrete pad. The existing pad has a pattern in the control joints that will look odd when the new structure is in place. Plus, we’ll have patched spots where we plan to remove the old post bases. There are two long (ADA) concrete ramps that we don’t want to replace, so we’re trying to figure out if we can hammer or grind down the existing pad and pour a new top layer to bring it back to the existing height. Obviously, we don’t want to go down 4-6 inches if we can help it. Any ideas would be gratefully accepted.