It's "Steel." I googled "John steel revell" and got quite a bit of interesting info.
My earliest memory of his paintings is of the first Revell "Picture Fleet" kits, in the late fifties. Those kits were reboxings of the very first Revell warships- the Iowa-class battleship, Midway-class carrier, Baltimore-class heavy cruiser, and Fletcher-class destroyer. All of them, of course, had appeared earlier with box art by other people. Steel did lots of other paintings for Revell after that - ships, aircraft, and armor. I don't remember whether he did any cars or trucks.
I read somewhere that he worked extremely fast, cranking out a painting every two or three days - on an easel propped up in his kitchen.
He did lots of paintings for Aurora - mainly reissues (including the famous WWI airplanes, the 1/600 warships, and the 1/48 tanks. And quite a few for Lindberg.
I've got the FSM cd set; I'll see if I can find that article.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.