It would be terrible for papier maché. That stuff needs white starchy flour...
The muffins will be fine. Holy crap, whole wheat flour isn't like sand or something. Its what while wheat bread is made from. It's fine for baking, but it usually needs more mixing and kneading to get to the right consistency. But that does require some baking skill, which the OP denies having... So cakes and muffins are great because they're easy.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker