Hi Ian1! Regarding the use of Atelier Interactive Acrylic, and mixing them with "Standard" Acrylics.
There are perhaps a couple of issues here, the first being that the AIA's have the unique property of being "Re-Wettable", and in this respect, they behave a little like Oils, in that you can go back to them within a specified time and Re-Work them.
"Standard" Acrylics don't have this property, as when they dry, you may have noticed if you leave a bruch charged with Acrylic to set, its usually "Bye Bye Brush!"
Accepting the above, if you mix AIA and "Standard" Acrylic, you will create a hybrid which is neither one nor the other. My advice would be to use them seperately.
I hope the above may help, but come back to me if you want any further information.
Very best wishes,
PA & RSC Wigan / Warrington / St Helens