Winston Cup teams have used both Metalax and Cryo processes for over 25 years now. There are several places over in NASCAR country that do both. One is/was called 300 Below if they are still around....
Back in the 90's a customer of mine had a 300 Below shop here in phx.
He used to carry 2 rubber bands with him
One had been cryoed, it stretched twice as far as the other from the same batch.
He was into firearms accuracy & bench rest competition shooting.
He Cryoed lots of gun barrels/parts.
I'm sure it would have it's benefits
For Engine parts as well
I'm not sure if he's still in business.