When Etching copper goes too far ?

I stamped a piece of 26g  with intent for a necklace that I was going to enamel or put colored resin in the deepened areas .....

I used the staz-on to stamp and put a big border of black sharpie around the edges - left a small border of copper around the stamp

Now I had full intentions to pull this out probably within 1-1/2 hrs - I even checked it twice - and I was probably 1/2 hour out and I got the "squirrel" moment - my daughter text me if I wanted to go get a pedicure - she was sick on mothers day so she wanted to take me today -  so I raced in the house - shaved my legs and picked her up -  1/2 way there I said - O well I guess my  copper piece is gong to be full of holes or totally eaten away - but it would be good to see what it looks like

I had read about how they made some copper lamp shades where they let the copper get eaten completely away   - thought gotta try one day

Well that day has come - it was amazing - I looked in the etching solution and I could see the design from the back through the tape
I took out and rinsed

look how intricate it was 

 It was like a lace - unfortunately some areas are not connected and the tape very sticky so to get off was going to be impossible without wrecking the design- giving me a few ideas for some pieces I want to do - but totally amazing how it ate around the etching right to back of the tape