I have a new lawn for two years now and it is quite good quality.
I would like to work on it over the next few years to try to get it to a standard wher I could use it as a putting green.
Am I wasting my time.
Also the structure of the surface under the grass is important. On a golf putting green, it is made of compacted sand with a very even surface, albeit a sloping one.
You could apply some sand, a little at a time, allowing the grass to grow through until you have a layer of about 2 cm. This should give you a smooth surface. Then cut as tightly as you can and feed lightly even couple of weeks to maintain growth.