Hey David thanks for the tips sorry I didn't see yours before I posted. If the knot starts to fall apart I may do a full restoration, but for now like almost all my antiques it will be a cleaned up survivor.
No problem, many come here and look for how to do this or for general information. Pretty much the same things you were referring to so I figured why not. This thread is super long and while it contains all the info you need it's buried a bit so it doesn't hurt to share the process again. I'm glad you like the brush. It looks a lot better than when you started. So nice work there.
You might want to try a high grit pad (I have one of the 3M 4000 grit ones from the auto parts store) and skip the Mother's polish for a nice satin look that'll probably hide a lot of the imperfections. I have one of mine finished like this and I really enjoy it.
If the knot stays together the original knots are quite nice.