Super assistance for starters

This grinding aid is super. Especially if you have never worked with a grinding stone. Have only without this help honed result well. Today I have taken the help and behold super sharp knives. After 6 meter I worked without the help and just grinded sharp knives. The aid has not damaged my stone. Did the aid rinsed after each knife with water and only then taken the next diameter. Also, I can see no scratches in the knives.

This assistance would buy again.