I've had a couple scissor beak birds. One didn't make it because I didn't know what I was doing, I didn't trim her beak and I fed her a mash, which made a wonderful mess. I eventually paid the vet to have her euthanized.... she was so sweet and adorable, but I just didn't know what to do for her.
Later that year my silkie had her babies and one came out the same colour as the pulley I had and later developed scissor beak...course of a couple days.
I purchased a pedipaw and used that to keep her trimmed. She learned to sit for it and all was well. I gave her to an older woman with a small flock and she's very happy there.
That's my story!
If you have the patience, it's totally doable. I suppose you have to feel that it's worth it too.
Best of luck!
I've never heard of applying pressure daily as a fix, but that is interesting.