After painting under the bonnet/hood I took a look at the underside.
I must admit I’ve been putting this task off because it’s not the most pleasant.
I’ve added a few old pictures from a few years back to show the difference!
Looks a bit better now, but will need a few more coats as it’s sucking up the paint.
1930 Model “A” Ford Refilled with STOPNOX at 17 Cents a Gallon
Interesting article from The Old Motor about the issues with spark knock, pinging and detonation back in the day.
Fuel with tetraethyllead additive names like STOPNOX and other references to either ethyl or nox in the name was common back in the day.
You can read the full article here