Wipe off the etchant and apply a very thin coating of metal polish
with anti oxidizing properties to the blade. This blade has a thin
coating of AUTOSOL metal polish.
Wipe off the polish on the lower section of the blade then work from
the ridge towards the edge. Work with just enough pressure to remove
the discolouration of the etchant from the temperline to the cutting edge.
If too much pressure is used the matt finish in the hamon will be
buffed out and you will need to repeat the etch again.
Good luck and happy polishing.