Can you use the side of a Norton? Never seen one so I don't know if they are homogeneous or not.
The first blade I noticed a bent spine on miked out at 8 thousanths out of true. I tried all the suggestions, a vise, hammering and so on. I finally resorted to wrapping it in sheet aluminum to protect it and slamming it as hard as I could with an 8 pound sledge while resting in on a half inch steel plate resting on the concrete floor of my garage.
All I can say is I didn't break it. When I remeasured it it miked out at 7 thousanths, and I think that was just the error in the measurement.
So I don't recommend trying to straighten it. I am still dumbfounded by those videos at Dovo where they sight down the spine on their new blanks and whack them a couple times with a little hammer on an anvil to "straighten" them. Who do they think they are kidding?
I got all obsessive and started measuring all my razors either with a micrometer or feeler gages. When I realize that I only had two razors that weren't out of true to some extent, and when I realized that I could tell if they were warped by the sound they made on the hone or strop, I got over it, bought a narrower hone and never looked back. The bevels will always be uneven along the length, but they will sharpen up nicely and I can't tell any difference when shaving.
Oddly, I have noticed that most of the warped blades are warped in the same direction, which I figure must be due to most of the grinders being right handed.