grizzzlys are tempered hard...so dont give up.
i use a coarse file,fine file,then a rough stone than an arkansas stone and then i strop.
do yourself a favor and when you loose or use all of those up buy yourself some 160 or 190grain ribteks.
night and day sharpening. with a fine file i can shave with mine.
or i like to use good ol zwickey or magnus...the big ones.
those sharpen easy also.
grizzlys fly great as do the others ive mentioned but i have to admit that i cheated on them and gave them a slight double bevel to ease the pain of sharpening....
dont give up yet you spent good money on em'
jamie