Here is where i think you went wrong. Unless you are a professional machinist or took it to one and didnt say it. When you see scoring in the cylinder that is wear. Not just marks on the surface. At that point you take the cylinder to be measured for out of roundness and wear. The machine shop then tells you what you can do to fix it. Hone and rings 99.99999% of the time dosnt work. There are specific tolerances that have to be met here. This is why when you take it to a machine shop and they say i can bore it without the piston in hand you turn and run! They will taylor make that cylinder to the piston. They will measure for cylinder to wall clearance and account for heat expansion and contraction.