Without perfect pre-treatment or shot blasting, powder coating never stays for sufficient time and the entire expenses is wasted. As we are specialized powder coaters in Poole, Bournemouth, Dorset we are very particular about this pre-treatment process.
Proper shot blasting would ensure removal of rust, previous paint coatings, and mill scale to make the metal surface completely bare. Powder coating on any surface other than bare metal is never durable. By technical standards, metallic surface ratings have been fixed at SA 3 and SA 2.5 to be judged fit for powder coating.