I don't think it needs a "professional" restore. It appears you removed the active rust which is important and I really like that you have kept the original scales. I have seen perfectly fine scales unnecessarily replaced. As far as sanding blades, it's best not to sand opposite the original grind marks. Having said that, I prefer not to sand and use an annealed x-acto blade to pick off rust and then follow up with a light polish with Maas. These razors are old and have history. It's my opinion that a beautiful well earned patina should not be buffed away.

-Matt