Mober, i have never tried what you linked us too but it looks like it would...maybe work , if yo had a tank big enough and the time and the soda?
i just wire wheeled mine and i installed a filter in the system. the filter i use looks like a roll of white twine and the water has to pass through that, it catches very small "junk"
i run all the water through it in the early fall and maybe all the way to december, then when the weather gets colder i open the by pass and let some through just so i have a good flow through the system to make sure i am not starved for hot water when everything (all my appliances) is running
there is a photo of my manifold and filter in the picture section you can link to at the top of the page. i am in my 9nth year and still on original pump and rads are always hot so i don't think there is too much crud getting in the system