Three days ago I disassembled the vertical stabilizer, deburred the skeleton and scuffed it, as I figured this would be easier before dimpling. Yesterday I cleaned up all the black dust from scuffing. I don't even want to think about the mess once I start with all the wing ribs ...
Today I also spent a little while in the workshop, dimpled the skeleton and countersunk the rear spar doubler where needed.
Now I only have to deburr and dimple the skin, then the VS is ready for priming.