(Old Rusty 15)
Put it on a cookie sheet, dribble plenty of 710 on it, let it set somewhere out of the way, and check it every couple of days to make sure that the 710 has completely covered all parts of the machine, top and bottom.
Then later, after you get the rest of them worked and come back to it, you’ll be surprised at how easy it will be to remove parts and fasteners to get it cleaned back up and put into service.
CD in Oklahoma