Mouthing

This link should help you : http://www.clickersolutions.com/articles/spt/SPT_Puppies.htm =)

Yes, the whole family should be in on it too! It won't really work if only one person does it.

When you know a guest is coming over, exercise Jersey before hand so he'll be more inclined to behave. When they get there, leash Jersey. Put your leash holding hand behind you back to were he can't get in front of you, and keep your hand there!

Tell you guest to ignore the pup, don't baby talk, hold, try to calm down, discipline him ect. All of this is attention. Negative or positive doesn't always matter to a puppy, attention is attention to them.

After he stops pulling, barking, whining, jumping, (all of which you ignore) and sits down say "good dog Jersey" *big smile* and give him a really good treat, like hot dog, real chicken ect. Don't get to excited, or he will to, but be sincere. After he is calm and quiet longer you can then lead him over to the person, and if all four feet are on the ground, they can reach down to pet him. Be sure their holding a toy, else he'll use their hands as one. If he jumps on them, bites the human, ect put him behind you again and ignore him. After he sits calm for a while (at least fifteen seconds) try it again.

Nipping is normally done by a hyper dog, so keeping him behind or beside you around strangers until he is sitting and calm, then make them hold a toy to shove into his mouth if he tries to grab them should really help you.

Holding him down, alpha rolling, ect are much more involved then penning a dog like most people think. If anytime at all you let him up before he's flat out still, and not being touched at all, you are rewarding strugling and proving nothing to him, in fact as you said it can rev the dog. I'd drop the idea totally, it's hard to explain and can hinder training a lot if done wrong.

Squarting with water though, I aprove of that. I've used a water bottle a lot, it works great! You can add a little vineger too if he starts to ignore it. Be sure to pair a word with it so he can learn how to avoid it. Say 'no' 'off' 'squart' ect while pointing the bottle at him when he's being bad, if he doesn't back down squart him. Later on once he stops as soon as he sees the bottle (if he hasn't connected the word yet) start saying it earlier, like a second before the bottle comes out until he understand the word means the water bottle.