I tried some marking spray and didn't like it. I thought it would be just the thing for marking a dark colored quilt. However, the over spray went everywhere, all around the edges of the stencil so basically I'd end up with the whole quilt top sprayed unless I did a serious job of masking off for each spray. I just gave up on it. Mine wasn't the June Tailor. Hopefully that brand will work better than the one I had. Let us know how you like it.
I love Tuesday Morning and have found some really good deals there.