Arc & spot welding
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Car paint glossary
Safe car spraying
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- Good work is possible only with good equipment
- Use thinner of the same brand as the
lacquer you are using.
- Two thin coats dry faster and give better
results than one thick coat.
- In equipping a shop get equipment with
sufficient capacity to provide for growth.
- Cheap equipment is no economy.
- Pressure variations upset the "pattern"
of the spray. The center of the spray is generally the "wettest
"—be sure the edges overlap.
- Read and heed the instructions of the
manufacturer of your spray equipment.
- Read and heed the instructions of the
manufacturer of your materials.
- Keep your air conditioner clean. Drain
- A small touch-up gun with an assortment
of color in small containers is a good investment.
- Never put equipment away without cleaning
thoroughly. A clean shop is a safe shop.
- Placing paint tube in thinner and pulling
trigger of gun quickly and thoroughly cleans all passages.
- Steel drums should not be used under
- Do not use steel floors. They may cause
sparks—and sparks are dangerous.
- A drop of oil on the working parts of
your gun smooths the action and preserves the mechanism.
- Never use pliers on your gun—use
- A round spray is best for wheel spokes
and other small areas.
- Keep your gun moving if you would avoid
runs and sags. Use a fan spray and overlap your strokes when covering
- Keep your spraying strokes parallel.
- Low air pressure causes rough finishes.
- Holding the gun too far from the surface
causes excessive dust and gives a poor finish.
- Holding the gun too close tends to cause
sags and runs. Pin holes in the finish are generally due to water or
oil in the air lines.
- Always make the first coat of lacquer
light. That seals the under coats.
- Gas sand lacquers, but not lacquer undercoaters.
The gas attacks the gum in undercoats.
- The longer the last coat of lacquer dries,
the more brilliant will be the finish when rubbed.
- Thinner will quickly remove lacquer from
metal parts. Keep your spray booth or room well ventilated but avoid
- A cool spray room may cause pitting of
- A temperature of 70° is recommended
for spraying and drying.
- Keep lacquers and similar supplies in
a steel cabinet—and in a room of about 70°.
- Excessive sanding or use of coarse paper
causes scratches to show when refinishing over old lacquer.
- Keep the hands off the bare metal or
finish of a car. Oil in the skin or perspiration injures lacquer.
- Paint removers contain wax and this should
be wiped from the surface with turpentine before spraying.
- Use nothing but lights protected with
vapor proof globes in a refinishing room.
- Lacquer spraying is not hazardous if
proper precautions are taken against fire.
- Foam type fire extinguishers are good
insurance in any shop.
- Run your exhaust fan for a few moments
after you have stopped spraying.
- Ground all electric motors, switches,
etc., to guard against sparks.
- Never install an electric motor inside
of a spray booth. Place a metal comb, well grounded, so as to keep static
electricity from accumulating on belts.
- Never drive an automobile under its own
power into or out of the finishing room.
- Disconnect the battery of every car that
enters your refinishing room.
- Invite your local fire or insurance inspector
to check over your shop. He is your friend. Follow his suggestions.
- When polishing the finish use a ribbed
cloth. It holds the polishing material better than plain cloth.
- All finishes break down in time. That
is due to either chalking, cracking, or peeling.
- Premature chalking most commonly results
from excessive pigment in the finish—possibly as a result of settling
in the container.
- Cracking may result from applying additional
coats without waiting long enough for the undercoats to dry thoroughly.
- Peeling indicates that the surface on
which the new finish was sprayed was not properly cleaned up.
- Orange peel effect may result from too
much air pressure, finish applied too thick, or insufficient thinner.
- Slow drying generally indicates thick
application, oily surface, or failure to remove all traces of paint
- Lacquer and equipment manufacturers want
you to get the best possible results from their products. Take up specific
questions with them.