Chessieboy, I like using scrapers cut from table saw blades, and my simple unorthodox method for getting an edge is to run it through the grinder @90deg. with a medium wheel. Depending on how you use it , and the thickness of the saw blade you can pull off thick shavings or fine hair-thickness ones. Use the opposite side of the curl. Often works best flat on surface to about 45 Deg.
Rich-