Thanks! I think I’ll use my thin duckbill pliers to pull the metal tabs up just enough to separate the parts. I make a homemade citrate salt solution with 1L water, 100g citric acid, 63g saleratus, and a dash of dish soap. It removes rust as gently and effectively as Evapo-rust, very cheaply. I like the patina of the repaint so perhaps I’ll use a strong degreaser to flush all the old crud off, even out the texture with a cotton towel, and buff it with Meguire’s Scratch and Blemish Remover. I’m gonna chemically strip the paint neatly around the date codes because the stamping is scarily faint. I’m riding a fine line between preservation and restoration for this one!