The only Crankshaft I ever broke was turned .030 on the rods & mains.

You have one that has been turned .030 and .040 and is damaged. A polish might make it useable, but how hard are you going to use it? Have you looked at all the other journals on the crank? What are you intending to do with the rods that were on that crank journal?

If it was mine, there would be a different crank installed.