I did this technique before, and wanted to try it over a background I made, instead of over colored card stock.
Cut up the darkest of the Foxy-Oxi backgrounds I made yesterday into ATC sized pieces.
Place a piece of Fusible Webbing (Heat n Bond is one brand of fusible webbing) over the Foxy-Oxi background. Use a heat tool to melt the fusible webbing and adhere it to the card stock. I choose the Lite fusible webbing, as it melts quickly with the heat tool, leaving nice large holes, giving a lacy appearance.