Preparation of material How to prepare your material for hot-dip galvanizing? The elements must not contain remnants of previous paint and surface protection. Welds must be cleaned and nonporous. Vent openings for letting air out of the hollow closed parts and pockets must be made, as well as openings for hanging. More about the preparation of elements: Guidelines for correct construction prior to hot-dip galvanizing General and technical terms for hot-dip galvanizing Small guide for the preparation of elements