Raytheon Beech Baron E55 - Page 579

Raytheon
AiKraft
Company
BARON
55
AND
58
SHOP MANUAL
PRETREATMENT
(WASH)
PRIMER
An
acid
etching primer
that
conforms
to
specification
MIL-C-8514 should
be
applied
to
improve
adhesion of the
finishing
coats.
a.
Mix
the
primer
in
accordance
with
the
manufacturers
instructions.
b.
Apply
a
thin
wet
coat
of
primer.
It
should
dry
for
at
least
an
hour,
but
not
over
6
hours
before
applying
EPOXY
PRIMER
I
a.
Mix
Epoxy
primer
(Item
22,
Consumable
Materials
Chart,
Section
2)
in accordance with the
manufacturers
instructions.
NOTE:
For
the best
results
these
directions
must
be followed
carefully,
since
some
manufacturers
require
that
the
primers
be
allowed
to set
for 1/2
hour
after
the
catalyst
and
basehave been mixed while others allow
immediate
use
after
mixing.
b.
Apply
a
thin
coat
of
Epoxy
primer
with
a
spray gun
using
35
to
40
psi
of
air
pressure.
A
dappled
appearance
indicates
that the
coat
is
too
thin.
c.
If the
initial
coat
is
allowed
to
cure
for
more
than
24
hours
before
topcoating,
sand the
primer slightly
to
roughen
the
surface
to
assure
adhesion.
Wipe
off
the
surface
with
a
cloth
dampened
with
a
solvent
(such
as
lacquer
thinner),
then
apply
the
topcoat.
APPLYING
EPOXY
TOPCOAT
a.
Mix the
paint
and
catalyst
as
directed
by
the
manufacturer.
b.
Apply
the
topcoat
with
a
spray gun
at
35
to
45
psi
of
air
pressure.
Two
coats
are
normally required
to
fully
conceal
the
primer
and
build
up
the
topcoat
film
to
a
thickness
necessary
for
adequate
service
life
and
beauty.
The
Epoxy
finish
will
normally
cure
to
approximately
85%
of its
full
hardness
in
24
hours
at
temperatures
of
80"F
or
higher.
EPOXY
TOUCH-UP
PAINT
REPAIR
a.
Mask
around
the
skin
containing
the
damaged
area.
b.
Remove
any
loose
edges
of
paint
by
using
a
high
track adhesive
tape
around the
edge
of the
damaged
area.
c.
Using
a coarse
sandpaper,
fair the
edge
of
the
damaged
area
with the metal.
d.
When
the
edge
of the
paint begins
to fair
into
a
smooth
joint,
use a
fine
grade
of
sandpaper
to
eliminate the
sand
scratches
left
by
the
coarse
paper
so
that
the
finish
will
be
perfectly
smooth.
Take
care
to
avoid
removing
any
more
metal
than
is
absolutely
necessary.
e.
Wash
the
sanded
area
with
a
solvent,
such
as
lacquer
thinner
or
methyl propyl
ketone.
Change
the wash
cloths
used
for
this
purpose
frequently
so
that
all
of
the
sanding
dust
will be
picked
up.
f.
After
the
area
to
be
touched
up
has been cleaned with solvent until all
trace
of discoloration is
gone,
apply
a
thin
coat
of
pretreatment
primer
to
the
damaged
area.
Dec
31/03PagelO
SECTION
12