There are four categories of storage for planes at AMARG:

Long Term – Aircraft are kept intact for future use
Parts Reclamation – Aircraft are kept, picked apart and used for spare parts
Flying Hold – Aircraft are kept intact for shorter stays than Long Term
Excess of DoD needs – Aircraft are sold off whole or in parts

AMARG employs 550 people, almost all civilians. The 2,600 acres (11 km2) facility is adjacent to the base.
For every $1 the federal government spends operating the facility, it saves or produces $11 from harvesting spare parts and selling off inventory.
Congressional oversight determines what equipment may be sold to which customer.

An aircraft going into storage undergoes the following treatments:

All guns, ejection seat charges, and classified hardware are removed.
The fuel system is protected by draining it, refilling it with lightweight oil, and then draining it again. This leaves a protective oil film.
The aircraft is sealed from dust, sunlight, and high temperatures. This is done using a variety of materials,
ranging from a high tech vinyl plastic compound, called spraylat after its producer the Spraylat Corporation,
of an opaque white color sprayed on the aircraft, to simple garbage bags.
The plane is then towed by a tug to its designated "storage" position. (Wikipedia)