"Burning In"

Our new monster candle for the coffee table in our living room came with instructions to light for at least 5 hours for the first burn, to allow the wax pool to form properly around the 3 wicks.
Brought to mind the "running in" instructions for new cars in the 50s and 60s. Before better engine manufacturing tolerances put an end to the practice it was common to restrict the speed of new cars to 30-40mph for the first 500 miles, which often led to hand made signs in the rear window - "Running In, please pass".