Thank you for your comments I'm glad that the technique will be useful to other people too.
I finished the face scrubbies quickly and now they are ready to use. If I had to weave in the ends they would probably sit in my "almost finished" pile until Christmas or something...
I made a test bookmark to see if I could avoid weaving in the ends with less square projects too and it worked! You have to crochet over the yarn loop on the last rows and every time you turn the work, leave a bit of the yarn loop shoving so that you can pull the end in one row at a time. If that explanation was not very clear, please tell so and I'll take a picture of finishing the next bookmark.
Here's the horribly purple test bookmark (I apologize to the people who think purple is a lovely colour. I'm sure it can be a lovely colour (if it's far away from me, preferably in a dark box in a cellar somewhere)) The picture does not make justice to just how purple it actually is. I'll probably inflict this one on someone as a Christmas gift:
Please tell me if my pictures are too dark, I think the brightness settings on the monitor I'm using at the moment are blinding so I may edit the pictures darker than I should.