I spent a lot of time with Walter Birdsong, the inventor and owner of the Black-T Finish by DuPont. I've known that family since I was a kid.
When the FBI chose Springfield for its 1911, they took his word it was the best. They did so based on what he told them. Springfield ships those guns to his company to have that finish applied to this day before final shipment. They are the last human hand to touch them before going into service.
Before he passed away, I had many, many conversations with him over the years about how certain guns hold up. When they refinish a gun, it's stripped to the white, meaning down to bare metal. He'd looked at frames and slides under microscopes for stresses in the metal.
Para was the worst he'd ever seen. Don't take my word for it, but I'd listen to the old man.