For quality results, all foreign material must be completely removed from the part being powder coated. This includes dirt, oil, grease, metal oxides, paint, welding scale, adhesive, etc. How the foreign material is removed is dependent on the size of the part, what the part is, and what the foreign material is. You can use chemical and mechanical methods.
At Dlubak Powder Coatings, we ask you to clean your part as best as you can, but we are happy to prepare it at a small additional cost. We take meticulous care that the preparation process is done correctly and we use multiple methods of pre-treatment. Chemical pre-treatments use a chromates or phosphates bathing and rinsing or spraying process along with a pre-heating process in out industrial oven. The most common mechanical form of preparation is sandblasting.