This is how marco taught me if i mess up my smile line, and it works for me when using brisa. i paint on the white gel paint or scuplt on the white gel. Then i get my oval brush, clean with scrubfresh (put a bit in the lid of the bottle or your dappen dish) and dry on paper towel and then back sweep the smile line. The gel clings to the brush and moves with it. i find it comes out wicked. if you have to go back and neaten it up, make sure you clean the gel off again with scrubfresh and dry the brush on a paper towel before you do it. also, do it like you mean it! if you pussyfoot around just trying to catch the edge it never works. paint your gel a little deeper so you've got a millimetre or two to play with, and then brush the smile out with a good sweep. don't know if i've explained that very well but hope you understand.