Even though the handle is finished, I decided that the surface finish was not very good as there was noticeable variations of shade on the surface due to the oxides formed after forging. What I did was heat the steel up once again to a bright red/orange and used a steel brush to remove most of the oxides. At a lower heat I continued to brush the steel to then generate an even bright finish on it.
The surface now looks clean and even, with an new bright, semi-shiny finish.