Review on Permatex 80037 Valve Grinding Compound by Antonio Curry

I used this to sharpen the blades on my old fashioned drum lawn mower. You apply the compound to the blades and then, after changing the wheels, push the mower so they rotate in the opposite direction. Grinding down the bottom flat blade will make them sharper. I learned this sharpening technique on YouTube and it worked great. Some landscapers were having lunch in their truck and watching me march back and forth on the sidewalk with a lawnmower. They thought I didn't understand how to operate it and offered to show me how to mow the lawn. I tried to explain the sharpening but they only spoke Spanish and I guess they thought I was crazy for thinking the concrete pavement needed mowing!