Best Air Compressor for Spray Painting

Spray guns use a lot of air for long periods, so the compressor you choose has a big effect on the finish. Here is what to look at.

Start with the spray gun

Check the air consumption of your gun in the manual. As a rough guide:

• Small touch-up and mini guns: around 2 to 5 CFM
• LVLP guns: around 5 to 9 CFM
• Conventional and HVLP guns: often 8 to 15 CFM or more

Always check the figure for your own gun. Size the compressor so its free air delivery is comfortably above that, with roughly 30% spare.

Tank size and pump type

• Small jobs and touch-ups: a 50 to 100 litre compressor can cope with short bursts.
• Regular spraying: a 150 to 270 litre belt drive compressor keeps up much better.
• Full vehicle resprays or daily use: a larger belt drive or rotary screw compressor.

A bigger tank evens out the pressure, but the pump output is what keeps the gun fed.

Clean, dry air matters

Water or oil in the air shows up as fisheyes and blotches in the paint. In the air line, fit:

• A filter and water trap close to the gun
• A regulator so you can set the exact pressure for your paint
• An air dryer for regular or professional spraying

Drain the tank before every session.

Hose and fittings

Use a hose with a wide enough bore so pressure does not drop at the gun, and keep it as short as is practical. Use quality couplings that flow well.

Tell us what you are spraying and we will suggest a compressor and the right filters. Call 021 435 5424 or call into Little Island, Cork. Browse our air compressors.