Lift up the edge of each applique and peel it off the surface of the tub. Use a razor or plastic scraper to help lift the applique. Do this carefully so the top two layers of the applique don't separate and tear.
Spray any remaining adhesive and applique with laundry stain remover or vinegar. Soak a cloth with the same solution and lay it over the residue. Allow the solution to soak for at least 30 minutes.
Remove the solution-soaked cloth from the residue. Wipe the solution and residue from the tub using a dry cloth.
Mix cream of tartar with hydrogen peroxide in a bowl and form a thick paste. Use this paste to scrub away any stains left behind by the appliques.