My first Dremeling Experience

Liz, first, if you don't have a hold on him that you use regularly when you need to keep him still, find one. When I need to I hold the dogs on my lap, belly up with my arm around neck to belly with my other arm on the belly - reaching to the spine. If I need a hand free I put my leg over their legs with the second hand. (This probably makes no sense but get him in a hold where he can't move much without hurting him.)
 
This hold is what I use when I have a rebellious pup. I don't want them to think that fussing can make me stop and yet I don't want to traumatize them so if I get a wiggler who's trying to get away, I use this I'm-in-charge hold.
 
Once you're holding him, turn on the dremel where he can see it. Turn it off and then give him a cheerio. (No matter how he acts) Be sure to hold him as long as he fusses. Depening on how nuts it makes him you can do this a couple of times or just to it a couple of times in an evening until he chills out when it goes on, then take the next step. The important issue, IMO is to not let him think he can stop you but to not traumatize him either.

Amen, Bunni

One other thing Liz, start on his back feet. They are easier to do because they are farther away from his mouth (and his ears). Front nails are always longer but get him used to back nails before you to the front.

Or.... you can set him on the dryer, smear liverworst all over the wall, and let him lick while you dremel. It's messier, but.... It works for mine, LOL.

I had the same experience when trying to introduce the dremel slow and easy.  For the last couple of weeks I've tried the Bunni "no nonsense" approach, but mine are too big to hold like that.  I tie them with a short lead (give them about 2 feet) to a large piece of furniture and just go to town.  I treat every few minutes.  They sometimes struggle a little, but as I do this more and more they are struggling a lot less.  Even with the fussing they are doing, it still is a lot less traumatic then nail clipping was.  I used to have to muzzle old Tank- he would air snap and scare the crap outta me!  No muzzle now- he just tries to pull his paws away every now and again. After I'm done they forgive me pretty fast, too- not like the nail clipping where Tank used to hide his large self into the tiny spot under my desk for hours and make me feel bad!

Bunni, he's got a "settle" command, which involves wrapping one arm around him and the other hand on his scruff, in case he gets wiggly.  Works great in puppy kindergarten and the vet's office - this time, not so much.
 
I gave him treats after every nail, super yummy ones, but he still acted like he was visiting Puppy Purgatory.
 
For this experiment, he was on my lap, and I was cross-legged.  His head was sort of nuzzled in the crook of my arm, and I could hold his paw in my right hand and dremel with my left.  I even put peanut butter on my elbow for him to lick off.
 
Maybe I need to try the no-nonsense approach - I just didn't want to scare him...