Yah, I've tried soaking it. There are some major nicks in the head (its nicked to an almost yellowy metal) and the "adjustable" portion of it is seized.
I've had adjustable's and fatboys where the adjustment dial was seized and I could not get it to move. Hence....came the pressure cooker with the hot steam. If you have a pressure cooker or can borrow one, put the razor in the cooker with a couple of cups of water and a couple of teaspoons of Cascade powdered dishwashing detergent. Let the razor cook for about 10 minutes while the indicator is just gently rocking. Turn off after about 10 minutes. After the steam and pressure is released, and it has cooled down, take it out and scrub it with a soft tooth brush and some Bon Ami cleanser. It should be sparkling and the dial should be freed up. If you have plating loss.....only re-plating will help that situation. If your at a thrift store look for some used pressure cookers. That's how I found my cooker and all I needed was a gasket made of rubber to seal in the heat and steam. Picked one up at the True Value hardware store for under 10 bucks.
Cheers.