4 Know Your Coatings
4.1 Coating Properties
Coatings are a blend of resins and additives to create a product that will provide a protective and beautifying surface to your
work piece. Different resins have different properties. It is important to use the correct coating to achieve a desired result.
Manufacturers of coatings can control the resin solids content, production viscosity, sheen, color, flow-out enhancement and
other properties. Some products offer ways to adjust the coating properties such as speeding up or slowing down the drying
time, adding catalysts to strengthen the molecular bond or adding flatting agents to lower the sheen. Manufacturers will often
give some guidelines on how to thin their product for spray application. There are many different types of spray equipment in
use. Coatings manufacturers cannot address all of them. It is important for the finisher to understand the spray equipment
and to use common sense to arrive at the correct fluid viscosity to produce the best possible results with the selected coating
and the equipment being used.
4.2 Your Choice of Coatings and Viscosity
Extremely thin, watery, or light bodied fluids such as inks, aniline dyes and oil stains can generally be used straight from the
can. RTS or Ready to Spray water-based finishing products are formulated to be used straight from the can without thinning
with a 3 stage or larger turbine. Most other coating products will need to be thinned anywhere from 10% to 50% depending on
the available air pressure of the turbine model and the properties of the coating selected. (See chart below).
Chart A Nozzle, Needle and Air Caps For 7600 Series Spray Guns
Tip/Needle Size
0.5mm (.197)
0.8mm (.031)
1.0mm (.039)
1.3mm (.051)
1.5mm (.059)
1.8mm (.07)
2.0mm (0.79)
Application
Spot repair and panel
blends
Auto base and most
clearcoats
Auto single stage
Auto single stage
Thinned primers
High build primers
High build primers
~ 6 ~
Air Cap
CC
B-HS
B-HS
B-HS
B-HS
C-HS
C-HS
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