5
Preparation of the surface and thinning of the paint are the two most important areas to be concerned
with to obtain the best results from your Spray Gun.
Ensure all surfaces are free from dust, dirt, rust and grease. If necessary rub down with sandpaper, or
similar.
Mask areas you do not wish to be painted.
Your Spray Gun is supplied with a Viscosity Cup. Viscosity is a technical term used to indicate if the
paint is very thin or very thick. If thin, the viscosity is said to be low, while if very thick the viscosity is
said to be high.
Viscosity is measured in seconds. In order to spray some paints they need to be “thinned” (diluted).
Thinning is very important when spraying. Most paints are supplied ready for brush application and may
need to be “thinned” (diluted) for spraying purposes.
Follow the manufacturer’s guide for thinning. If in doubt please contact the manufacturers of the paint.
The Viscosity Cup supplied will help you determine the correct thickness of the paint. Paint is “thinned”
by adding the substance which the paint is based upon. If water based paint then water is added, if oil
based then white spirit, if automotive paint then an automotive paint thinner is added.
As some paints, wood preservatives and other sprayable products contain particles, please ensure that
when filling the Paint Container of the Spray Gun, that the paint is filtered through either a funnel with
a filter on it or through nylon tights or stockings. This will ensure that no large particles enter the Paint
Container, so preventing blockages and providing you with trouble free spraying. Ensure that a
facemask, gloves and goggles are worn at all times when spraying.
This Spray Gun can be used with paints having a viscosity ranging from 15 to 30
seconds. Dip the Viscosity Cup into the material and fill up. Time how long it takes for
the viscosity cup to empty (Fig.1). Using the above chart (or manufacturer’s
instructions) as a guide, determine if the material requires further thinning, if so then
thin accordingly.
Important: Before you begin to thin the paint, ensure it is stirred thoroughly.
If the paint requires thinning, start with a 10% dilution of the paint. To do this, half fill
the paint container with the required paint. The Viscosity Cup supplied with the unit holds 1/10 of a litre,
block the hole in the Viscosity Cup and fill up with the required thinner. Add the thinner to the paint and
stir, measure the viscosity using the recommended viscosity chart above.
If the paint requires further thinning, dilute the paint by another 5% (5% will be equal to half a viscosity
cup) with the required thinner and measure the viscosity, if the paint is not at it's recommended
viscosity, repeat the above step.
Note: Some paints are outside the ranges listed above. Please contact our helpline for further
information.
Water based paints
20-25secs
Oil based paints
15-25secs
Enamel paints
15-25secs
Wood preservatives
no dilution
Primers
20-30secs
Varnishes
20-25secs
Aluminium paints
15-25secs
Wood stains
no dilution
Fig.1
VISCOSITY GUIDE
PREPARATION
THINNING
Summary of Contents for ASG55
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