Createx water based acrylics for external wall mural?

Thomas Barber

Double Actioner
How do Createx water based acrylics hold out on external walls. The wall is painted white.

Is there anything i would need to put on top of the paint when finishing?

Is there any thing i would need to do to prepare the wall?

depends what type of paint the white base is. If you can do a test patch that won't show if it gets ruined, I would use a urethane auto clear to protect it, but it could react with the base coat. Also does it need to stay there forever, or just for a certain amount of time, clear coat is fairly permanent. As for the wall prep, same as with anything I guess, degrease and lightly scuff.