I do murals on commission and I have several in my present home. I have done
them on both plaster and sheet rock walls. Every time, the walls were primed
and painted by the people, prior to my starting.
I use acrylic paints exclusively ( tube or liquid) and they have lasted many
years without fading, peeling or chipping. One difficulty with acrylic, is
the speedy drying time. I use a retarder , such as a glazing medium (can
get it in craft stores) which gives a more translucent look, or I use an
extender ( which gives more open time to work the paint). I mix it with my
paint (a little does a lot!). Sometimes, I may put the extender on the wall
itself and paint over it.
If little handa are near the mural, you can put an "eggshell" finish clear
acrylic glaze oevr the mural to preserve it, just as you would for a painting.
Hope this helps.
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