embossable velvet book marks, a question.

[addicted2crafts.livejournal.com]

You use acetate rayon velvet, so basically you're melting it for lack of better word when you iron over the stamp and that creates an "embossed" look. Well can you use any stamps that have deep ridges, like a daisy stamp or a dog paw stamp or a unicorn rainbow stamp, or should it be kept to letter stamps only?