Cover areas where cleaning solution could cause damage.
How often the a/c should be cleaned depends on the environment in which it has
been operating. It is important that the airplane be kept in a clean condition and
repeated cleaning should be accomplished as often as necessary. The necessity for
cleaning is indicated whenever there is any appreciable amount of soil
accumulation, by the presence of salt deposits or other contaminants, by evidence of
paint surface deterioration and by the presence of excessive oil or exhaust deposits
or spilled electrolyte and deposits around battery area. Cleaning is required
immediately after exposure to adverse weather conditions, salt spray, after repairs
or service which left stains, smudges or other gross evidence of maintenance.