1) "Fuzz" the transfer on a microfiber cloth or other fabric (if it is a new transfer)
2) Apply the transfer to the glass
3) With a makeup sponge or sponge brush, apply Armour Etch etching cream in a thick layer - be sure to wear gloves!
4) Allow etching cream to sit. The longer it sits the deeper the etch. I'd recommend at least 10-15 minutes.
5) Remove transfer and wash in water. Remember the transfer is reusable!
6) Rinse off etching cream from your glass