Let me see if I can turn back the hands of time about Simonize.
IF the surface was clean, the stuff was an easy job. Apply thin (yes, even back in the dark ages-thin was in), let flash, wipe (rub) off.
The problem was that we didn't really know what a 'clean' surface was. We would wash, dry, slap on the wax. THEN is was RUB off.
Simonize had a 'paint cleaner' (green can) that when used, did help to remove the oxidation (remember, we're talking SS paint). But like so many back then, we'd just slap it on and hopefully RUB it off.
Using the cleaner with a rotary was a game changer. The problem with a rotary (then) was a lack of pads other than wool (actually the whole sheep on a plate). Yes, there were liquid products (DuPont, Meguiar's...), but the average man in the garage really wasn't aware of them.
All this changed in about 1955 or so when Simonize introduced "Vista." This was the first AIO out there. That was a dream come true.
Bill