It's a really big job. I had read about soaking the entire head in kerosene, so I wanted to try that on a frozen Singer 99. My DH told me there was a big vat of kerosene at his job, so we took the machine there and left it overnight. The vat of kerosene had some other solvent in it also, and my Singer 99 came out completely bare, inside and out. That was the easy part.
Next comes finding the paint and primer. I had read about using automotive paint, so that is what we used. I found instructions on the internet about the process to use; painting, sanding, and clear coating. I even made decals on my inkjet printer, although they in no way resembled Singer decals, and were not gold. It came out to be a rather personalized machine, but it did work like it should.