What action must be taken for a part that shows signs of heavy contamination?

For a part that exhibits signs of heavy contamination, the essential action is to remove the contaminants completely. This step is critical because any remaining contaminants can interfere with the bonding process, leading to poor adhesion or structural integrity. Ensuring that the surface is clean helps to achieve optimal results during assembly or repair.

In contrast, performing only a Final Wash may not suffice in cases of heavy contamination, as it may not completely eliminate stubborn residues. Trimming the damaged areas might address physical defects but does not ensure the surface is contaminant-free. The use of additional glues could also be ineffective if the surface is not adequately prepared, as contamination can hinder the ability of adhesives to bond properly. Therefore, prioritizing the complete removal of contaminants is essential for ensuring the effectiveness and durability of the repair or assembly process.