download During rail transportation or extended storage near industrial areas,
vehicles may occasionally be subjected to contamination by airborne iron
particles shed from either railroad tracks, train wheels, etc., or
exposure to heavy machinery facilities. These particles can adhere to
horizontal painted surfaces of vehicles and quickly corrode when
combined with moisture. If not immediately recognized and removed from
painted surfaces, they become embedded and cause further paint damage.
INSPECTION: This type of contamination can be identified by the presence
of small red or brown particles on the paint surfaces. These particles
are often difficult to see on dark color paints, but still can be
readily felt when brushing a hand or fingernail across horizontal body
surfaces such as hood, roof, or decklid. CAUTION: Because of the
abrasiveness of these small iron particles, polishing or buffing
procedures should not be attempted to repair the paint surface of an
affected vehicle. This will result in further paint damage and detract
from vehicle appearance. CORRECTIVE ACTION: Washing the affected paint
surfaces with an oxalic acid solution is the recommended method to
dislodge embedded iron particles and remove the surrounding rust stains.
ZEP X-20472 “INDUSTRIAL FALLOUT REMOVER” is one of several
commercially pre-mixed oxalic acid wash solutions and is very effective
in removing iron particle contamination. The correct usage of oxalic
acid solutions is described in this bulletin
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