Acrylic is very vulnerable to scratching. So the protective paper, or film should be left on during all transportation and shipping.
You can either cut them short or leave them somewhat long
Overnight
As long as acrylic is solid and not flaky you can.
You leave it in water or out in the rain for a long period of time.
you put wax paper between the beads and the iron
no
In My Life i have faded in and out of different stages.... That paper will fade if you leave it outside to long
rice
It depends how long you're heating it.
Most times you don't have to put paper mache in the fridge but if you want to my best guess is probably about 30 minutes to an hour.
Do you realize that you can get FLAT ACRYLIC PAINT. Flat paint refers to the gloss level. You may want Gloss, Satin, Lowsheen or Flat. Acrylic paint on the other hand refers to what the paint is based on or what binder is being used. Acrylic paint is also refered to as waterbased paint. You most likely are referring to putting flat acrylic over lowsheen or gloss acrylic. In answer to your question - as long as they are both acrylic than you will not have any problems. I am in this answer assuming that you are referring you house paints. If not than the same principle applies - acrylic over acrylic is fine. To keep acrylic from going glossy just don't polish it.
You can typically leave out cooked turkey bacon for a few hours without it spoiling. It should be covered with a napkin or paper towel.