Using an iron is best.

But you can glue down monokote if you want. It's just plastic. CA can work, but as pointed out, it usually makes a mess and is ugly. 3M-77 works, and actually works well with the monokote glue. When I put heat shrink or tape directly on foam, I spray with 3M-77 first, and it really helps the adhesion. I've also used goop for quickie field repairs to get plastic film to stay put.

Still, get an iron. In the long run, it's the way to go, and you'll get more than your money's worth from it.