Two hours is good, then you can start on the other side the next day. Really, the time it takes varies. Some stainless finishes polish out easier and quicker than others. I don't know why, they just do. But I would not be too concerned about how long it takes to polish it out. It will take as long as it takes to get the finish to the shine you want. It is your gun, a little shine, or a lot of shine. Just depends on the time you want to spend.