if the edges (bottom and sides) are stochinette, they will curl. If you do not like that, you can give them a border while you knit ( garter stitch, seed stitch, some ribbing....) and so on. If you have already knit a good bit and do not want to start over... try a crochet border around the scarf after you are done.
Or pick up stitches around all edges and knit a garter or ribbing edge or the like.
Blocking on acrylic is not the most efficient, mostly. And do not do it too hot as you may "burn" the fiber.
Continental Knitter with passion, pretty busy and always onto something new.
I have been away from the forum for a bit, but I am still around!