Hunter HEPAtech 140, Owner'S Manual

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PAGE
19
G E N E R A L C A R E
SHALLOW SURFACE SCRATCHES
Remove the scratches by lightly hand wet sanding
the surface with 600 grit sandpaper. Sand only
until the scratches are removed (to retain as much
thickness as possible). This will create a dull
surface. To improve the surface gloss, sand the area with 1000 grit, then 1500 grit
sandpaper. The surface should be starting to
recover some of the gloss. To further increase the
gloss level, polish the area with ultra fine polish
(automotive polishes suitable for clearcoat).
COSMETIC DAMAGE
Cosmetic damage is defined as a problem that
does not affect the overall structure of the part or
area. They are usually appearance concerns, such
as scratches, surface mars, and minor dents. It is
very important to ascertain the full extent of the
damaged area. If any jagged edges or cracks are
present, see the consequential damage section.
Mask off the damaged area, lightly hand sand (220
grit) the damaged area to remove any surface
ridges and to promote adhesion. Sand in one direction only. In a well-ventilated area, apply
a thin layer of Plexus adhesive in a 1:1 ratio to the
damaged area. After the Plexus has dried, smooth
the area with a fine (220 grit) sandpaper. Now,
apply a thin layer of MA310 Plexus or Marine Tex
to fill in any imperfections, and allow to dry. Lightly
sand with a 220 grit sandpaper, followed by a 400
grit sandpaper, then a 600 grit sandpaper. Finally,
apply an Krylon Fusion to match the color.
CONSEQUENTIAL DAMAGE
This type of damage can be holes, cracks, or large
dents. Cracks, even those found around holes,
must be prevented from growing. To do this, the
ends must be found and blunted (by drilling small
holes). Once this is done, the crack can be ground
or routed into a V groove. This allows it to be filled
easily and promotes a good bond. We suggest
using a Dremel tool, being sure to work in a well-
ventilated area.
Mask off the damaged area and lay down a bead
of Plexus adhesive in a 1:1 ratio into the damaged
area, slightly under filling the V groove.
S
AFETY
Use of solvents requires adequate ventilation,
keeping in mind that they are usually highly
flammable. Use proper procedures to avoid
injury. In some instances, the use of these
materials is controlled. Check all regulations
prior to using.
Keep in mind that a repair can only attempt to
match the performance predicted in the original
part. The repair may not be quite as strong or stiff
as the original part. The overall part/system
behavior has probably changed.
The Plexus will expand as it hardens. Skim the
excess Plexus (if any) from the repair area
keeping it level with the surrounding area. Allow to
dry for 1 hour. Sand the damaged area until the
surface is flush with the surrounding area. Apply a
thin layer of MA310 Plexus or Marine Tex to fill
any voids. Allow the filler to dry, then wet sand
with 220, 400, then 600 grit sandpaper.
After sanding the repaired area flush to the
surrounding area, paint can then be applied.
Recommended paints are
1
501 Krylon Fusion
2320 gloss white.
Always follow all warnings and instructions given
by the manufacturers of the products used for
repairs.
This information is provided for your guidance
only. We urge you to make all tests you deem
appropriate prior to use. No warranties, either
expressed or implied, including warranties or
merchantability or fitness for a particular purpose,
are made regarding products described or
information set forth, or that such products or
information may be used without infringing patents
of others.
C
ONSIDERATIONS
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