I just finished my first long skinny scarf using one skein of novelty yarn out of my stash. I used my Bond Ultimate Sweater Machine, which I've had forever, and took me just under an hour! That is, after the learning curve where I figured out how many needles to use and after I ripped it out the first time. The trick was using every other needle and going very slowly. I was afraid I'd run out of yarn before I got it cast off so I actually could have made a few more rows before ending, but that’s also part of the learning curve.
I used 9 needles total, although I thought I had cast on more, but that was before I started over. I think I may sew this into an infinity scarf as it will wrap around my neck 3 times, which looks like a faux fur collar. I thought the weighted hem was really too heavy so I only used one weight bar on each side, and once it got long enough, I used my knees to support the weight. Again, I can’t stress “go slowly” enough! When it got really long I started using the claw weights. I had to rip back a few rows a couple times, which was the reminder to slow down.
I have several more skeins of this, and some eyelash, yarn that I want to get out of my stash. They make really great, fast, inexpensive gifts and add a pop of color to an outfit. And yes, they are surprisingly warm, although you do have to get used to the fibers against your bare neck. :-)