Seth, you'll find that as you get deeper into refurbing/cleaning pipes that you'll run across stems with a lot more oxidation than on that one.
I was recently turned onto micro-mesh for sanding stems. This is something you'll have to get into to remove bigger nicks and tooth marks. I have been using wet/dry sandpaper and it works, but doesn't last long. The micro mesh will work wet, which is the best way to sand anyway. I haven't had a chance to use mine yet but have it and it looks good. They say each 2x2 pad is good for about 100 or so stems. You can use it, clean it and let it dry and then use it again, over and over.
Vulcanite has a memory of sorts so smaller tooth marks can be removed using heat. I run the areas with tooth marks over a heat source. I use a bic. This will raise the tooth marks. I do mine a bit, then let the stem cool. I then use the heat again. Most the time the tooth marks will disappear completely or almost anyway. I follow this with the sanding to take them out completely. Then buff the stem so that you never even know they were there. With bigger ones, I heat and repeat untill they stop going away and then sand them till the stem is smooth with the mark and they are gone too. Sometimes it takes a lot of elbow work, but the finished product is worth the tiime involved.
You did a good job on that one and now your probably well hooked and will probably buy more estates once your done with those.