This is why I suggest sanding any ball yourself before you throw it, it is very difficult to truly replicate factory finish period, not just factory polish. The Brunswick Brands however do make it a little easier by listing all of their finishing steps, but you will never get the pressure or time exactly the same. There is nothing worse than loving a ball's reaction but being unable to duplicate it. The closest I have gotten in trying to replicate 1500 polish was starting with 1000, 1500, 2000, 3000, 4000 then finally Storm Step Two. I have done the same finishing grits but instead used Crown Compound, and while I really liked the reaction, it just wasn't the same.