This guide refers to common protective treatments for the chemicals classified in Tables 3.1a through 3.1h. More exotic treatments@ such as lead sheet@ glass@ or metalizing are included@ but not usually called for except in extreme or unusual circumstances. Because various treatments provide different degrees of protection@ product producers should be consulted for each application. In all cases@ specific recommendations from material producers should be followed instead of the general guidance given in this guide@ as individual treatment types vary widely within a specific product type. Specific product recommendations are beyond the scope or intent of this guide.