"He who marches out of step hears another drum." ~ Ken Kesey
Un-rounded blades can cause premature stencil breakdown as well as increased wear on mesh. In addition they can cause "shirt streaks" which made people like Nike ballistic. Mainly on autos.
Ok I read everything, and found out I,m just one simple cheap ole bastard...I have a pc of sand paper glued to a pc of wood and all I do is rub the edges of the squeegee on it, and it rounds very nicely.Darryl