Final answer:
Restorers should clean salvageable smoke contaminated finished floor coverings at the start and end of the restoration process to prevent the spread of soot and ensure all particles and odors are removed.
Step-by-step explanation:
When salvageable smoke contaminated finished floor coverings are encountered, restorers should plan to clean them at the beginning and at the end of the restoration process. The initial cleaning helps to prevent the spread of soot and odors, while the final cleaning ensures that any settled particles or odors that have been released during the restoration process are removed. This approach maximizes the likelihood of restoring the floor covering to a pre-loss condition.