FTIR analysis can form part of an investigation into existing protective coating systems where coating history or generic binder chemistry is uncertain. This can be particularly useful during coating condition surveys, maintenance planning and failure investigations. Laboratory findings should be considered alongside field evidence such as coating condition, layer structure, dry film thickness, adhesion, corrosion, defects and maintenance history. FTIR analysis alone should not be interpreted as proving coating compatibility, identifying an exact commercial product or determining remaining coating service life.