Thank you all! I really appreciate the comments.
FrightKnight, none of the "prosthetics" created in the tutorial were stamped with any kind of texture, as I've found it seems to take on its own skin-like texture(thanks to the cotton) as it dries. The forehead prosthetic I actually pulled from a slip mold, and that was lightly done with terrycloth (I still can't believe I had no texture stamps or even oranges in the house...for
shame! 
). It's still quite smooth though on purpose, so I just stipple some various shades of thinned RMG to give it some dimension.
I'm thinking very seriously about taking Dick Smith's introductory course and finally getting set up with proper molds and making foam gelatin appliances. Liquid latex is fun on a budget, but I'm pretty eager to step up to something more sophisticated. I just need to learn how. This makeup stuff is just way too fun.