We have 3 different brands of stencils. I make my own stencils which are #'d with ##-ST, The Crafters Workshop stencils and TSC stencils. They are all high quality material and have great design.
Most of the stencils are inside stencils, by what I mean is that there is a frame around the stencil and the paint is going in the design of the stencil. An outside stencil is a stencil where there is no frame around it and the paint goes around the outside as well as the inside. Since most stencils have frames, I will only mention when the stencil is an outside, frameless stencil.
My youtube videos on my spray painting and iron on designs are: https://www.youtube.com/channel/UC-xVE1Jfq0p1pMDok4JjWcQ Just copy and paste. I also mix creamy, cheap shaving cream with acrylic paint to sponge paint. The paint sets in 24 hours, then you heat set the paint with a cotton setting on your iron for 30 seconds in each spot. The paint is only permanent on 100% natural fibers.