Wax layer destruction from seed coats
This paper describes dewaxing of sunflower seeds using various solvents. As you have already shown for yourself, using hydrophilic substances such as bleach and acids do not work well in removing the waxes. 

Waxes are highly hydrophobic substances, and must be removed with either hydrophobic solvents (much like washing away acids with water at the emergency eye-shower) or detergents and water. The hydrophobic solvent mixtures used for lipid extractions recommended in WYSIWYG's link will likely work as well.