Using macroscopes, the entire fractured surface can be seen, along with any other anomalies.   Coatings can also be seen through a macroscope.   Macro-Examinations can also be performed on a polished and etched cross-section of a welded material. During the macro examination, a number of features can be determined including weld run sequence, important for weld procedure qualifications tests. Also, any defects on the sample will be assessed for compliance with relevant specifications. Some of the features such as Slag, lack of weld penetration, lack of sidewall fusion, porosity and poor weld profile are observed in such examinations. The part is visually examined and its condition evaluated. Macroetching is the procedure in which a specimen is etched and evaluated macro structurally at low magnifications. A number of different etching reagents may be used depending upon the type of macro examination to be made.   Any fractures (primary fracture surfaces as well as any secondary fractures), visible distortion, corrosive attack, wear or other damage to the part is thoroughly described and documented. It is then determined if any corrosion or wear is normal to the application or may be associated with the failure. No sectioning or other altering of the part is done before a complete visual examination. It is normal to look for defects either by standard visual examination or at magnifications of up to 50X. It is also a routine to photograph the section to provide a permanent record. This is known as a photomacrograph.