Astro Pneumatic Tool 4538 Economy Air Undercoat Gun

To spray bar and chain oil with this: using a camp stove and a pot (I used a burnt pot which will no longer be used in the kitchen), you need to heat up the bar and chain oil in the pot until it starts steaming. Then attache a rubber hose to the bottom of this air sprayer, put the other end into the pot with oil, and you can spray the bar and chain oil with no problem (and no need to mix in diesel, wd 40, or other junk to thin out the bar and chain oil). It works really good as long as the oil is hot. Obviously, wear safety stuff (glasses, good breathing mask, gloves). This sprayer atomizes the oil so you will have atomized oil in the air afterwards for a while. And it's a bit messy. But does a great job coating with bar and chain oil.

I've had this undercoat gun for about a week now, I've done 3 vehicles and 1 ATV with it so far and it has worked great. My undercoating of choice is Fluid Film, and this gun sprays it well. As other reviews have mentioned, I found it sprayed best at about 80 PSI or so, with no thinning of the Fluid Film.The gun comes with two lengths of pickup tubes, one longer one and a shorter one. It would be nice if it came with a longer "barrel" as well to help get into those tight spaces, but at this price I can't complain. I did try to clamp a hose on the barrel to get into those spots, but found it filled up with fluid and then the gun sprayed out of the vent hole on the top of the container. I'll probably do some more experimenting with this, but that's also probably due to the viscosity of the Fluid Film, as it is very thick.As for containers / bottles, this gun does not include one, but again at this price it's to be expected. I had some Zep brand chemical spray bottles laying around that fit, and I think the Home Depot brand bottles are the same so they should fit as well. I think most wide mouth style chemical spray bottles would probably fit.Overall I'm happy with this purchase, it does the job it needs to do, and the tool is well built for only being about $15 bucks. I would buy again, and I look forward to continuing to use this gun.

Won't work well for U-POL Raptor bedliner but as for function, it works well. I bought some bedliner and accidently ordered a kit that didn't come with a spray gun so found this as it's the cheapest one I could find and with Prime 2-Day shipping I could get it fast. Either stem wasn't long enough for the Raptor bottles and the bottles' necks were smaller than the attaching point on the gun but the gun still performed very well. I figured for how cheap it is, it may be a little inconsistent and basically disposable but I'll still keep it around in case I need to do some undercoating or something down the road. I see no reason to buy a high dollar expensive gun to do the same job this one will.

Would be 5 star if the threads for the cup existed anywhere in the known universe... southern engineered an adapter, 50 psi un-reduced Rusfre on a 80 degree day... looks factory.

Well made works well

I used this gun with the 3M body schutz system and it worked great. I would recommend this over buying 3M's expensive gun.

I used the Home Depot spray bottles another user posted. Sprayed Rustoleum bed liner perfectly at 45psi, using a regulator & water separator at the gun. This was with a small twin tube Stanley Bostich compressor. For the money this would be hard to beat for a back yard bedliner or undercoating set up.

Works alright. Sprays product in clumps and not very spread out. I used this to spray fluid film. If I was to do it again Id buy once cry once with a better application tool. Quality of tool is good for value.

I was able to find a bottle to fit this sprayer quite easily. I used a vitamin bottle. An alternative would be to connect a hose to the inlet and place the other end in a large can of whatever you are spraying

Dose what I wanted. You'll want a decent sized compressor as you need the air, otherwise it'll be slow going. Hard to find cans to fit it where I live. Proform sells black rubberized in the right cans, 30$ a can though. Saved them and just refill with oil/wax undercoat. I wish it came with a can or.you could buy empty/cheap ones.

Le meilleur avec Fluid Film.

Used home depot spray bottle, thread worked, the gun works perfect with Fluid Film.Best bang for the price.

Works well. I ran 12 or so feet of rubber line from the suction tube to my pail of oil spray fluid. It actually had no problem pulling the stuff through that far, and now I don't have to keep changing cans.