Yes I know. Sorry, got distracted by the chicken part.

I do understand the problem. Perhaps I've been lucky. Sylph from the field group is the only one so far to cause any pain from pecking, she's had whole finger tips in her beak which hasn't hurt as much as her pointy beak!
Some of her enthusiasm I've put down to be lowest in rank and anxious about getting her fair share, or more.

She's been last to eat since she hatched. She's got past the panic now. She knows if she gets blocked out of the treat feeding I'll make sure she'll get her share, sometimes by saving some and feeding her separately.
I don't know what to suggest about grabbing the web between thumb and forefinger; never happened to me.

If the piece of food is in the correct place when feeding with the closed fist method (piece held in the fold of the forefinger) a hit at the web is rather a major misjudgement on the chickens part, on my hand a good inch from target; have you thought of taking the offender to an optician.

What I can suggest on the topic of sharp pointy beaks is to have a look at the beak checking for rough patches close to the tip and filing them smooth.
They should get this done themselves when they wipe their beaks, but of course, if they're wiping their beaks on a trouser leg it could take some time.

I've used the "that's painful" reaction in the past when testing peck strengths and it's worked.