No matter how efficient the recycling scheme is, sorting is the most important step in the recycling loop. One of the main issues that recyclers face is the removal of the paint on plastics. Properties of recycled plastics can be compromised because of stress concentration created by these coating materials (Kang and Schoenung, 2005). Grinding could be used to remove coatings, e.g. chrome from plated plastics can be removed by simple grinding, sometimes assisted with cryogenic methods to enhance the liberation process and to prevent the plating materials from being embedded in the plastic granules. These cryogenic methods provide good liberation, but the actual separation of plastic particles from the paint is problematic (Biddle, 1999). Another way of paint and coating removal is abrasion, best applied on whole parts of significant size. Solvent stripping is also used by recyclers, which involves the dipping of the coated plastic into a solvent, liberating coatings from the plastic. This method is applicable for compact disc coating removal (Biddle, 1999 and Kang and Schoenung, 2005).