Today I received an Escher stone I paid quite a bit for. It was listed as being "barely used." The surface of the stone has irregularities that I can feel with my hands. I think it is basically flat but would not hone a razor on it for fear of one of these irregularities catching on the edge of the blade. Can this be easily fixed? I have a lapping plate I use for my coticule and also have some wet/dry sandpaper up to about 1200 grit. Does anyone have any recommendations or do I need to return the stone? Thanks.