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Fig. B
Do not use textured wall paints or coatings as this will block the nozzle.
To obtain the best results, it is important that you prepare the
surface to be sprayed and thin the paint to the correct viscosity,
before you operate your spray gun. Always ensure that the surfaces
to be sprayed are free from dust, dirt and grease. Make sure that
you have masked the areas that should not be sprayed, using a
good quality masking tape. The paint or fluid to be sprayed should
be thoroughly mixed and free from lumps or other particles. Many
substances can be sprayed with your spray gun, but always check
the manufacturers recommendations before purchasing your paint.
Thinning Fig. B
Always remember to disconnect from the mains supply before filling the paint container
with spray able material.
Most paints are supplied ready for brush application and will need to be thinned before they
are suitable to be sprayed. Follow the manufacturer’s advice on thinning the paint when used
with a spray gun. The viscosity cup will help you to determine the correct viscosity of paint to
be used. To determine the correct viscosity, fill the cup to the brim with the paint. Measure the
amount of time it takes for the cup to empty back into the can. The table below shows
recommended times for different types of material.
Plastic & latex paint 24 - 28 seconds
Water based paint 20 - 25 seconds
Primers 24 - 28 seconds
Varnishes 20 - 25 seconds
Oil based paints 18 - 22 seconds
Enamel paints 18 - 22 seconds
Aluminum paints 22 - 25 seconds
Car undersealing 25 - 35 seconds
Wood sealers 28 - 35 seconds
Wood preservatives No thinning required
Wood stains No thinning required
If the paint takes longer than the recommended time to empty, then
further thinning is required. Mix in a small quantity of the appropriate
thinner and use the viscosity test until the correct thickness is achieved.
Some spray able materials contain particles and lumps. These
materials should be strained before filling the paint container.
Spraying
Fig. C
Fill the paint container with the correctly thinned and strained paint. Connect the spray gun to