Apply a thin layer of matte medium, and press any paper or backgrounds into place on the canvas or artboard. Allow to dry for two to four hours.
Thin the acrylic paint by adding water until you have a watercolor-like consistency. Glaze the background media with the desired colors.
Continue adding paint with a lightly loaded paintbrush until you are satisfied with the image.
Mix gel gloss medium 1:1 with your paint, and apply heavily with a painting knife anywhere that heavier objects will be added. Allow to dry for five to six minutes.
Carefully press the three-dimensional found objects into the mixture of gel gloss medium and paint.
Allow to dry overnight. Add any final details, and spray your painting with several coats of acrylic clear coat sealant.