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PAINT / PRIMER INFO.
Paint Types
Latex - Water based
- Most Popular, Usually less expensive.
-
Fade Resistant, easier clean up environmentally friendlier.
- Fast
drying, requires no special thinners or solvents.
- Less
dust pick-up. Preferred for walls, ceilings and primed woodwork.
Alkyd - Oil based
- Better
flow properties, allowing for a smoother finish.
- Harder
more scrub able, stronger bond to many surfaces
- Slower
set up time allowing more time to work a particular area.
- Preferred
for Wood trim, cabinets and metal surfaces.
Primer
Types
Oil/Alkyd
-
It does NOT raise the grain of the wood in the same manner that
latex would.
-
Better results sanding for a good prep job.
- It can easily be painted with oil or latex.
- Can
penetrate wood surfaces for a very strong bond.
Water/Latex
- Easier to use and cleanup
- Knots will have to be primed to prevent bleeding.
- Will not get as high of a gloss finish as you would get w/oil.
- Today there are more water born products available.
Advantages of Oil VS. Latex
Latex finishes:
- Resist fading, easy clean up
- low voc, flexible, breathable
(allows moisture to pass through),
- fast dry, requires no chemical solvents.
Oil
finishes:
- Flows
out during application, protects metal, washes well,
-
Resist smearing and marking, penetrates into chalky surfaces
-
Strong initial bond to most surfaces
Previously
Painted Surface
- It is not usually necessary to prime previously painted
surfaces.
- Any bare wood or patched areas should be spot primed
with appropriate primer.
- Stains,
knots and graffiti need to be sealed prior to painting.
- Ceilings:
Applying a quality latex primer sealer to ceilings prior to paining
with the finish will often
give better
results , it eliminates the splotchy look.
- Some latex sealers dry
glossy, but the flat will be easier to paint over with the ceiling
paint.
- Painting over flat latex finish paint with a glossier finish paint
will probably leave splotchy results.
to prevent this first apply a quality wallboard primer or latex
primer sealer or just use 2 coats
finish paint.
Finish
- You should
always consider the type of paint presently on the surfaces.
- If the surface has been
painted with latex last time, then it may be best to stick with
latex for the work.
- Latex will expand and
contract farther than the oil-based, in time oil over latex could
lead to problems.
- Latex may not bond to a
previously oil painted surface has been previously painted with oil,
especially if the surface is glossy .The gloss would at least
have to be dulled down prior to painting .
Stains Knots Graffiti Discolored
Ceilings
- Different Types Primer
Sealants Include: latex, alkyd and alcohol based primer sealers.
- Areas to seal prior to painting include:
Water stains, ink, crayon, and knots will need to be sealed
prior to painting. Generally
you only need to spot prime these areas.
- The alcohol based is
usually the best choice but the hardest to work with, alkyd next and
then latex.
- Knots usually
need the alcohol based sealer.
- Water stains
will usually cover with the alkyd or alcohol sealer
- Discolored
ceiling may not paint well with even two or more coats of ceiling
paint. Using a good
quality latex primer sealer
prior to the finish ceiling paint give
the best results.
- Smoked up areas
usually fair better using the oil or alcohol primer sealer.
Wallpaper
- Vinyl and older type
non-vinyl wallpaper can be painted, often without a primer.
- A quality primer sealer
is a good choice to insure a good bond to vinyl wallpaper and seal
any color
from bleeding.
- Non-vinyl wallpapers
can lift when painted with a latex paint or a latex primer sealer,
therefore an oil
based primer sealer
would be
recommended
on older type wallpapers.
- Once the paper is
primed it can be painted with oil or latex finish paint
Metals
- Most new metal installations come
pre-finished, or primed.
- Any bare un-oxidized metals should be
primed with the proper type metal primer.
- Ferrous metals (steel, iron) can usually
be primed with a standard gray or white metal primer.
Oil Based
- Galvanized Metal
should be primed with a Galvanized Metal Primer.
- Aluminum metal
Can be primed with the galvanized metal primer, or the
standard gray primer.
- Latex bonds to aluminum
and can be used for a primer under latex finish paint.
- On slightly rusted
surfaces use gray metal primer.
- Heavily rusted surfaces
use a red (Iron Oxide) metal primer.
- The more rusted the
surface, the darker the metal primer used should be.
- Other commercial grade
primers are also available for certain exterior use.
Finish Paint
- Once properly
primed, most metal interior metal surfaces can be painted with
almost any quality paint.
- Metal door and heat
registers usually fair better with an oil base/alkyd.
- Gloss Metal Enamels
provide the most durability, but can sometimes be more difficult to
work with,
and the high gloss
may be over bearing.
- Semi gloss or eggshell
gloss trim paint is a good choice for steel doors.
- Latex Paint will bond to latex or oil primer.
- Oil finish paint will bond to the latex or oil
primer, but may not always work out so well over the
latex due to the higher flexibility of the latex.
-
You should always consider the type of paint presently on the
surfaces.
- If
the surface has been painted with latex last time, then it may be
best to stick with latex for the work.
- Latex
will expand and contract farther than the oil-based, in time oil
over latex could lead to problems.
- If a
surface has been previously painted w/oil, latex may not bond
to that surface as well as oil base
paint especially if the surface is glossy, the gloss would have
to be dulled down prior to painting.
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