Do you use masking tape? I use a lot of masking tape for guiding machine quilting and top stitching. I don't like the mess marking pencils make (especially on very dark or very light fabrics). You can see here where I used 1" masking tape to use as a guide when stitching my sister's drawstring casing.
To keep the tape from being too sticky, I'll run the tape over my clothes first so the adhesive gets a little fuzzy. Easy on and easy off!
I'll try to get a picture of my sister's bag to share soon.
Hugs to you all,
P.s. Lauri, still plugging away on my butterflies!