It looks like the islands of finish I thought I was sanding out turned out the be the scrim left from where I had sanded through its in a few spots. The bow is salvageable, but is now about 10 lbs lighter than needed for my recipient. (Just perfect for my son).
I spent another day over at JamesV's shop for more pointers on running tapers with a thickness planer and advice on rub on finishes. Ms Sara made me a great BBQ chicken lunch and then James sent me home with a couple of new taper sleds and a reflex-deflex longbow form.
After a couple of years of winging it on my own with info I learned online, it sure is nice to have someone with a wealth of knowledge who is willing to share in a hands-on fashion. Thanks again, James and Ms Sara, for your hospitality and friendship.
I got the smooth on in the mail over the weekend and have the new glass ordered for the replacement bow. The core tapers are ready for the glue up. I just need to make my new handle which I will do this week. By the weekend, I should be ready to start finishing the bow. This has been a real learning experience.