[bugeye]

I sharpen the blades about twice a year. Mow about four acres of mostly uneven field grass. The blades are caked with grass/weed debris like the picture. I clamp the blades to a metal stand outside then hit them with a wire wheel on an angle grinder. Green deposits come off quickly. Then sharpen with an angle grinder.

I clean the deck underside at the end of the season and apply a bit of used oil to the surface.