Howdy Group,
Yeah, once you get a good edge on your spokeshave it seems to stay sharp for a really long time.
Here's a link on blade sharpening. (This guide seems technical but don't worry about that. From this sight, I made a cheep, simple honing jig that works like a charm.)
http://www3.telus.net/BrentBeach/Sharpen/sharpen.html Note: Although your spokeshave blade may be 2-1/4" wide, you can't get that wide a ribbon - you'll just get a lot of chatter and frustration.
Working lengthwise along the back of your bow, you start by removing wood on the outer edges creating a slight rise (or hill) toward the middle. Then you focus on removing that raised portion along the middle to again get a flatter back. Then you start again toward the outside edges, creating a rise. As a result, you should be removing long, paper-thin ribbons that are around 3/4" to an inch wide with very little effort.
I hope that's helpful.
All the Best,
Canoe
And, yes. I got the reference. "...it was a typical case of American blind justice." - Arlo Guthrie