normally I sharpen the blade just before I etch my mark..
I have used masking tape to cover the whole blade but I find it's a pain to mess with cleaning up and I feel unnecessary.. and I've in the past taped just the edge too,not that it's wrong but if it's on a mirror polish you'll get crap up close to the tape edge causing an abrasion there that you'll have to clean up causing more work too,, Now,
if I have to rework or touch up the handle after I've finished the blade
I wrap the blade in paper towel fold the end over