PPGI is prepainted galvanised steel, also known as precoated steel, coil coated steel, color coated steel etc. PPGI is prepainted galvanised steel, also known as precoated steel, coil coated steel, color coated steel etc.A galvanised steel sheet in coil form is cleaned, pretreated, applied with various layers of organic coatings which can be paints, vinyl dispersions, or laminates.These coatings ...