Step 1 - stamp image on cardstock using waterproof/smudge proof ink.
Step 2 - using a white wax crayon draw over areas you want to stay white. I highlighted the edges of the butterfly and some of the lines. Brush off any little bits of wax.
Step 3 - start colouring image using water based inks and foam dabbers/applicators. You can now see the bits I have highlighted using the wax crayon .... it resists the ink and leaves the area white.
Step 4 - Finished ATC
A really quick and easy stamping technique. Lots of different ways to do it on you tube so all credits to the youtube postings. But this is my way ...