This review will keep the Devilbiss FinishLine 4 FLG-670 into perspective of an HVLP paint spray gun, giving you everything you need to know about it. We are all jammed with thousands of spray gun options out there. So if you need something more specific that can facilitate your buying decision, this is it.

Some say paint is pain, and that’s true most of the time. But having a quality paint applicator can really ease the pain. By giving a satisfying look to the paint finish and ensuring the smooth texture of the surface, an HVLP spray gun is of great value.

But will it be the case with Devilbiss FinishLine 4 FLG-670? Let’s put this spray gun under the spotlight!

Startingline And Finishline – How To Distinguish?

Startingline And FinishlineSome may get confused between the StartingLine and FinishLine as they are all HVLP spray guns. And the fact is, Devilbiss produces both types of them. When putting them against each other, the competition is closer than you think. So what are the differences that really set them apart?


Given that they are from the same manufacturer, Devilbiss FinishLine and Devilbiss StartingLine fall into different categories.

While StartingLine is an entry-level spray gun, its counterpart – the FinishLine is more cut out for paint spraying enthusiasts and pros. Devilbiss separates them this way in the hope of wider coverage on the market.


And as the two come in different categories, they target two different sets of users. It’s fair to say that the Devilbiss FinishLine is more high-end than the StartingLine. Its expected higher target translates into better material, more professional atomization quality, and a bit higher price range.


StartingLine is a good choice for beginning painters, which focuses on being minimal and newbie-friendly. The FinishLine, on the flip side, is more of the “Plug-and-Play.” It is packed with more adjustment options of the fluid nozzle.

The StartingLine is a good deal for small projects, DIY works, patio furniture, and touch-up painting on small-medium surfaces. The FinishLine, with a wider range of PSI, is more versatile, which can cover almost all sizes and texture patterns of the surface.

Which Sprayer Is Better?

If you prefer Mozart to Beethoven (or vice versa), it does not mean that one musician is better than the other. They’re just good at different things; the same principle should be applied here.

The two Devilbiss have their own edges and appeal to different users. And for this reason, in our review, we will look at the Devilbiss Finishline with our expectation for a professional HVLP spray gun.

Devilbiss FinishLine 4 FLG-670 Review

Devilbiss, overall, is a brand with a good reputation. Been around since 1988, Devilbiss has evolved from the first atomize for healthcare (with the simple component of a bulb, some tubing, and a base of an oil can) to a trademark HVLP technology used in paint application.

Common features found in a Devilbiss product include ease of use, durability, and decent paint quality. Devilbiss FinishLine 4 FLG-670 is one of the most advanced spray guns not only from the brand but also on the market. Let’s now see what is all about it.

Key Features

Worth-noticing Product Specs

Worth-noticing Product Specs

  • Type of sprayer: Gravity Feed Spray Gun
  • Value: Solvent-based
  • Series: FinishLine 4 from Devilbiss
  • Pressure: This spray gun requires 13 CFM at 23 PSI
  • Fluid tip/nozzle options: 1.3mm, 1.5mm, and 1.8mm (included in the box)
  • Product weight: 1.5 pounds (Specific dimension: 5.5 x 5.5 x 10.0 inches)
  • Paint texture: Smooth, light primers, solvent-based coats, topcoats
  • Usages: Interior, Exterior, Heavy-duty, DIY, Automotive, Touch-up
  • Paint-containing cup: 900cc Aluminum (included in the box)
  • Air control: Air adjusting valve with gauge (included in the box)
  • Body material: Stainless steel (Aluminum cup)

Ease Of Handling

Ease Of HandlingWith the weight of 1.5 pounds, Devilbiss FinishLine 4 FLG-670 is relatively lightweight. The design allows for well-balanced holding and handling. As this spray gun is quite compact, you can hold it for a long time without exhausting your hands and arms.

What’s most worth-praising about the design should be the handle. It fits into hands quite easily, giving the ergonomic experience while painting with it.

The minimal design also allows for easy manipulations when assembling, disassembling, and cleaning. Either you are an occasional user or a hobbyist, this spray gun is well suited.


DurabilityStainless steel body and aluminum cup, this Devilbiss FinishLine spray gun will not need too much maintenance after use. Still, regular cleanup is advisable to prevent clog-up in the nozzle.

This spray gun is also an appeal for career painters or those who will need to use a quality paint applicator over the long run. In the competition with other HVLPs on the market, the Devilbiss FinishLine comes with a comparably fine degree of product finish and material quality.

Controls, triggers, and adjustments on the gun catch up with the tough body as well. So there should be no need for replacement in the first few years of use.

Nozzle Options

Nozzle OptionsThe abundant nozzle option offered by Devilbiss FinishLine 4 FLG-670 is a feature that really stands the product out from its rivals. Right from the box, you are packed with three nozzles that can cover almost all surface scales.

  • 1.3mm – Urethane clear coat
  • 1.5mm – Base colors
  • 1.8mm – Epoxy primers

This is a big treat from Devilbiss, as you won’t have to buy additional nozzles and worry about the compatibility. These three options can cover from touch-up spots to large surfaces. And as mentioned earlier, it is just “plug and play,” saving a lot of your time when switching to different tasks while painting.

Overall Performance

Overall PerformanceThe new FinishLine 4 series from Devilbiss offers one of the latest atomizing mechanisms. It can help to achieve superior results in painting with precise viscosity and coverage.

The paint pattern coming from this spray gun is proved to be uniformed, soft, and smooth. And with its high-end atomization from the air cap, the paint mist covers the surface with less drippings.

Eventually, you can reduce the waiting time for drying, and the surface can dry evenly. If you have any other painting tasks after that, the entire area will be ready.

If this is the very first Devilbiss product in your shopping history, that should not be any worries at all. The manual is very detailed and understandable; it makes things much easier to start, set up, and use.

Value Of Money

Value Of MoneySegmented itself as a product with professional-grade paint applicator, Devilbiss FinishLine 4 FLG-670 brings a price that is well-aligned with the quality.

Even though the price is understandable given that level of performance, if you are not looking for something serious in the paint quality, this may not be the option for you.

Still, considering many extra accessories coming with the box, Devilbiss FinishLine 4 FLG-670 is a good deal. Three nozzle tips for all painting tasks, a durable aluminum cup with a high volume of 900cc, and all the advanced features from Devilbiss, they really tick the boxes for being a good saving in the long term.

The Good

The GoodSo, the good thing is, Devilbiss FinishLine 4 FLG-670 really deserves the pros. With all the features scrutinized above, this spray gun shows up with precise atomization, easy maintenance, and pro-quality paint finish.

Here are all the good points about it:

  • Easy to use and clean
  • Limited drips and streaks
  • Versatile adjustment
  • Minimum maintenance in need
  • Primer, clear coat, base coat are all good
  • Comprehensive manual

The Bad

The BadThere are actually some downsides to this Devilbiss spray gun. Even though they are just minor inconveniences considering all the upsides of the gun, it’s still worth our honesty to provide you the info.

  • No Carry Case: It can be inconvenient when you want to take it from job to job or store it for later use.
  • No Filter: Devilbiss FinishLine 4 FLG-670 is not equipped with a filter at the bottom of the cup. You should attach one to the gun to avoid the dirt and contaminations from the airline.
  • No Wrench: The box does not provide any wrench; you will need to have one for yourself when changing the nozzle. But it should not be a big problem because you probably have at least one already.

How To Use A Gravity Feed Spray Gun

How To Use A Gravity Feed Spray GunIn order to have a smooth finish when spray painting, there are five things to adjust:

  • Fluid Nozzle/ Tip
    Different nozzle sizes will give different results. So depending on your painting purpose, you can choose the appropriate nozzle among the three options – 1.3mm, 1.5mm, and 1.8mm.
    To change the nozzle, you need to unscrew the air cap and the paint control knob. Push out the existing nozzle (if any), insert the appropriate nozzle of your choice, then assemble the air cap and paint control back in place.
  • Cup & Filter
    Before actually using the gun, place a filter in the spraying cup. Then, fill the paint (thin it first if necessary) in the cup through the filter with the amount depending on your surface area.
  • Air Inlet
    Ideally, the pressure should be set at around 40 PSI. At this level, you will have nice coverage, consistent texture, and less paint waste. Not too high and not too low; it also reduces both the drippings and the speckles.
  • Trigger
    For best results, you’d better pull the trigger once for every paint line. Besides PSI, how you hold the trigger can also affect the paint pattern. So the happy distance from the sprayer and the surface should be around 6 inches.
  • Fan Control
    Depending on the size of the surface you are painting, you can control the fan knobs to have a suitable paint fan. Crank it all the way in; you will have thin lines and dots, so it’s better for touch-up and small projects. Crank it all the way out; you will have a wide paint panel.
  • Paint Volume
    The paint volume knob allows the needle to come back or forth further. The further you screw it out, the further the nozzle and the more paint can come out. This means that it can control the lightness/boldness of the paint pattern on the surface.

See Also: Devilbiss Tekna ProLite Review

FAQs About Devilbiss FinishLine 4 FLG-670

Can I use a smaller cup on this Devilbiss FinishLine?

Yes, you can use a cup with a different size. However, make sure that the thread size is the same.

Does this sprayer work well with the Latex paint?

No. Latex paint can be too thick for it, even when you use the biggest nozzle tip (1.8mm). So it is recommended to use the paint types that the nozzles are designed for.

Do three tips come with three separate needles?

No. You will have one needle that goes with all three tips.

How does Devilbiss FinishLine 4 FLG-670 work with automotive?

Impressively. It is cut out for automotive and industrial paint works.

Does this Devilbiss FinishLine come with an airflow gauge?

Yes. The box includes an adjusting valve with which you attach to the sprayer.

Does this Devilbiss FinishLine sprayer work with oil-based or water-based paint?

As advised by the brand, Devilbiss FinishLine 4 FLG-670 works with oil or solvent-based paint. Water-based paint can cause corrosion to the internal parts.

End Of The Line

We can come up with a short answer that the Devilbiss FinishLine 4 FLG-670 still remains its own value to be one of the best HVLP sprayers.

Everything comes with pros and cons; however, the cons we are talking about are not so considerable and should not be a big hindrance to your buying decision.

So if you are painting for a living or having serious projects, and of course, don’t mind paying for the long-term use, the Devilbiss FinishLine 4 FLG-670 is, all things considered, a wise choice.