I've had proper results with acrylic art paints thinned with water.
Applied with a sponge using paper stencils.
I had a slightly more trashy aestetic preference back then though.
We recently bought and used some acrylic "fabric" paints - to echo drøn it just appeared to be very thin acrylic paint. Worked quite well for printing with fruit and veg though.
I've had proper results with acrylic art paints thinned with water.
Applied with a sponge using paper stencils.
I had a slightly more trashy aestetic preference back then though.