I recently bought Darlene Olivia McElroy & Sandra Duran Wilson's book "Surface Treatment Workshop", it will probably become a book study, but I found this exciting technique and didn't want to wait to try it! They say that embedding objects and papers into your surface creates interesting textures that seem to be custom built to your artwork, like having architectural elements for art.
Use adhesive to secure the desired objects to your surface and allow to dry. I used matte gel.
Then use a palette knife to apply molding paste to blend the edges and add more texture. Allow to dry.
This embedding technique makes the added elements appear to be a built in frame. Waiting for the molding paste to dry before I turn this into an ATC.