Preparing retired equipment for use again

Historically, this depicts an old piece of equipment to being brought out of a shed or other storage, then having the dust removed to make it ready for being put to good use once again.

This can be used as a metaphore or "figurative language" to apply the principle of "readying something" to be useful once again.

rig n. 4. (MWD)

tackle, equipment, or machinery fitted for a specified purpose

dust off vt. (MWD)

to bring out or back to use again

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Example article applied to a bicycle

Example article applied to drilling equipment