- Firmly press the edges of the resist you are using.
While contact paper is a lot cheaper than vinyl, it does not hold as well and when just a bit of that etching cream gets under the contact paper it creates a messy edge. - Liberally - and I mean liberally - apply the etching cream. It can have a tendency to go on thin. But you've REALLY got to get a ton of the etching cream on the glass.
- Leave it on - FOREVER.
This last time, I was going to leave it on for about an hour. Then I forgot about it and it was on for about 4. And I finally got the results that I wanted. So from now on, I'll leave it on overnight if I have to. - Go for a smaller etched area.
Trying to "go big" with your etching area, really opens you up for error. Go for a smaller, more subtle effect and you'll actually multiply that impact with a crisp, clean finish. - Buy it with a coupon.
Etching cream is really pricy. But if you've got a list of pricy supplies you know you'll use, visit AC Moore, Michaels or Hobby Lobby* with their weekly coupons to stock up and never pay full price. Etching cream has become one of the supplies I don't want to be without.
It is these factors that have gotten me from a miserable failed piece like this:
To exactly what I hoped for:
I have to totally agree with you. I wish I could have had this knowledge when I etched my bedroom mirror to cover a scratch. The directions on the etching cream need to be rewritten. You need to use a ton of cream and you need to leave it on forever... but the results are so worth it as your mugs show.
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