I bought a misleadingly advertised stone from amazon that said it was medium and fine grit (double sided) after receiving it i realized the fine side was only 400 grit. Obviously not sufficient to get the edge I want. Ive since ordered two more stones that will definitely get the job done but my question is should i bother with this stone now before i receive the finer stones? Will solely using such a low grit help my blade right now (for the week or so for shipping) or should i leave it?