GUF plating is a special plating process designed to prevent white rust. Thanks to addtionnal process, pieces plated in GUF can resist white rust for a very longer period (up to 10 years). ProEngiTech is the sole company in Thailand that ensures service of GUF plating.

Each lot of parts treated in GUF process will be checked to guarantee appropriate thickness by reliable apparatus and, for an ultimate accurate result, by micrographic method.