You can co-wash for sure! Lots of 3As do it.
I have 3a type hair and I was wondering, can I co-wash? Wouldn't it make my hair too oily or would it help my hair keep moisture?
Just be sure to use the right styling products so you're not using anything that isn't water soluble.
yes you can .. i am 3a and my hair looks cool! your hair can look a bit greasy in the first month though. its something like "awkward stage"
You can co-wash using a light conditioner and make sure you thoroughly rinse it off of your scalp. You can try adding a little lemon juice to your co-wash conditioner for more cleansing properties as well.