Dr. John Kanca taught me this a few months ago but this is the first time I tried it. This is a 2015 composite at #8 lingual-incisal with a rough margin, probably was a "white line" area that broke down. The composite was Filtek bonded with Surpass.
I have no idea how this will hold up under the assault she puts on her teeth, but at least for today it looks good. I think it'll do just fine.