Liquid latex is really easy to work with, like a slightly thicker paint. For this you might want to use a stencil on a bodysuit and work in sections. The only difference to paint is that you will need to powder the latex as it dries, so it doesnt stick to itself. Painting the suit on a cardboard cutout would help a lot with this as you could work in large sections and go back easily.
As for "types" there's thinner types used for makeup application, and thicker mask and body paint types. Its the later you'll want to use.
(This is where i've bought from before)
You can get similar on amazon, but I didn't see brown. You CAN however color liquid latex with a bit of acrylic paint if you want a custom color (dries darker than when wet)