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The storing process mostly requires wheeled carriages and machines, that would drag dirt and other substances inside the warehouse\hangar, beside any oils leaks and tires rubber caused by friction, would making the area prone to accidents easily, which is dangerous for your employees and inventory as well.
cleaning such areas requires precession, experience and special tools and other components, which unlike your average cleaning kits that wont do the job, for example fuel leakage could do some serious damage even to protected floors surfaces, some damage even take time to show as it might sink deep into the surface and decompose it bit by bit, leading to a sure accident in the future.
steamers, and high pressured water cleaners are needed in such cases, and of course our 25+ years of experience.
choosing is a wise management decision that will save you time, effort and losses.