What should be done to a structure before covering it with doped fabric after inspection?

Before covering a structure with doped fabric, it is essential to apply a protective coating of paint or varnish. This step is vital because it serves several purposes. First, the coating protects the underlying material from moisture and environmental conditions that could lead to corrosion or deterioration. Second, it provides an additional layer of durability to the surface that will support the doped fabric.

While some might think that leaving the structure untreated or applying a moisture barrier could be sufficient, these options do not offer the comprehensive protective qualities that a paint or varnish would provide. Sanding down the structure completely is also unnecessary, as it could damage the surface instead of preparing it properly for the fabric application. Thus, applying a protective coating ensures that the structure maintains its integrity over time and enhances the overall performance of the covered area once the doped fabric is applied.