How should I handle precoated or recoated parts?
Precoated or recoated parts may already be insulated with 1 to 2 mils of coating. Powder starts to repel itself around 4 to 5 mils. Turn down the gun voltage (Kv), by at least half, to prevent the repelling or back ionization of the new powder material. Also verify with the powder supplier to ensure proper intercoat adhesion.