Astro Pneumatic Tool 4538 Economy Air Undercoat Gun

Used this to spray Rust-Oleum Truck Bed Liner on my hot rod floors, and it worked great at the recommended pressure. Very easy to clean by spraying water out of it to to rinse the system.

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.

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.

Works very well!! Used a sunny D bottle, it worked but not well .I need to get a more sturdy bottle with better quality threads. A swivel air hose adapter is a good addition!! NO more rusty frames!! 80w90 2qts, 30w 3qts, 1 tube red&tacky grease,8 cheap toilet wax rings heat and stir well and spray it on ! 👍 used oils, make it cheap ! A nod to groil U.T. ✌ 👏👏

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.

After an infuriating phone call being told that my appointment to have my truck fluid filmed had been canceled after being scheduled a month in advance i decided i would do it myself, this product made the job easy, all i had to do was pick of a spray bottle and some clear tubing from the local hardware store and i was in business. i had no problems with this spray gun and have used it to spray fluid film(recommended) and boiled linseed oil with no problems.

It will work for a small project

I purchased an ABN spray gun to have a second gun with the spray wand already attached, so going back and forth would be a quick swap of the air hose. Unfortunately the ABN gun has a really long siphon pipe to fit my standard Schutz bottles and it wont accept the threads on HDX spray bottles that I am going to use. (BTW... The $2 HDX bottles fit perfectly on the Astro 4538 gun.) So, I took the spray tip from the ABN gun and put it on the Astro gun so I can easily swap in the wand when I need it. The spray tip threads are exactly the same between both guns. I will try use the ABN gun with the Astro spray tip installed and a length of hose on the siphon pipe to feed from a gallon jug. Even tho the ABN gun cost $14 and the cheapest spray wand I could find that would fit the Astro gun was over $20, I am still way ahead even if all I can use is the spray tip and wand. This Astro gun feels like quality in your hand compared to the other gun.

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.

This thing works amazingly with fluid film. It aerosolizes the fluid perfectly for spraying wide areas and laying down a nice thin and even coat. For getting into hard to get areas and spot treating just attach a 1/2 foot to 1 foot piece of 3/8" inner diameter vinyl tubing over the nozzle. Buy the bottle to hold the fluid from home Depot like everyone else says!

Antirouille pour véhicules

It sprays 'Fluid Film'! I was searching for an inexpensive sprayer , and not the airless sprayers (probably the ideal choice) due to cost considerations. I sprayed the undercoating tmat abiut 80-90PSI. Very easy to control. Fluid Film is the consistency of soft butterscotch pudding. My other undercoating gun wouldn't even pick it up. This thing will launch the compound about 4 Ft! Matching a bottle/supply container: An earlier review was correct. Buy an HDX Spray Bottle (white/opaque) from Home Depot for $3.49. Works flawlessly