Just do it! If they bitch take it off. Sheesh!
But! In retrospect I'd probably ask them.
Concept: If you find a new way to machine something which is really good, and you hide it from everyone so they don't steal it, then you'll only have a few customers. If you show people what the new process does, your visitors will say, "Oh! You can do that? I need you to do that for me too."
There are those who will try and mimic your idea, but they don't know the things you went through to figure out the answer. Don't be afraid to show people how you do things. Some will need your expertise. Besides that, people will generally follow the one who figured it out.
Sad story: I had a customer I was doing thousands of one part for. He saw my setup which included a Wells Index Mill with a right angle attachment. The process was a plunge slot in a part about 5/8" in diameter and about 1/2" tall. I was using a 3" diameter milling cutter in the right angle attachment.
He decided to do this himself. He brought me the check for the last batch, and said I bought this cutter and it's the wrong one. He said the teeth are going the wrong way. I looked at it in his hand and reached over and turned the cutter over for him. I didn't say anything. He sheepishly just went away. He went bankrupt a few months later.
Regards,
Stan-