they actually have some with an adhesive back at our hobby lobby. for the stuff we used it on, we we layered it and stuck it together with that, and then painted it with a coat or two of resin. that was able to hold it together really well.
Best to use hot glue for flexibility, like if you plan to do it for the thighs inner parts. yes it can be colored with either enamel or acyrillic paint.