Looking good, brother!!!
And no, you can't sand silicone. But there's a neat trick to keep it from sticking all over you and you can run your finger on it and make a perfect bead.
Rubbing alcohol. The white stuff, not wintergreen. You put it in a little spray bottle. Lay down a bead of silicone and squirt your fingers and the bead. Run your finger down it and nothing sticks to your fingers and it goes where you want it.
I understand the irony of letting go that little gem now instead of before you started. It's making me smile.
