Here is another one which needed more work as the base was cracked , so i made a new base and did the same trick with the shaft machining. Lucky i made a spare when i did the previous one .
I pull everything down to the bare bones the clean and paint strip the parts . I soak every thig in an acid bath to remove the rust . I use a 20-1 water and phosphoric acid solution which only reacts with the rust . I leave it in the solution for 12-24 hours . Next is a wash and a wire wheel on the grinder to stop oxidization. I mechanically polish all the gears ,shafts and scews while i am waiting for the paint to dry . Whole process can take about 20 hours but i have got my system down to about 12 . I love doing them and gives me great satisfaction seeing what i started with and what i finished with . The aim is to get a write off and resurrect it so if works for another 70 or so years.