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What am I doing wrong???

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  • Member since
    December 2020
  • From: Kansas
What am I doing wrong???
Posted by DM1975 on Saturday, January 16, 2021 1:50 PM

I have a cheap airbrush that I could not get to steadily spray a light line. It will start and then just stop flowing paint. I stop and try again and as I pull back the trigger I suddenly get a big shot of paint. I tried thinning and changing my air pressure but it will either stop spraying paint (just air) and then bam! Big blob

So I bought a bran new Iwata eclips yesterday and the same thing is happening??? I'm trying to pre shade but it's just a mess. What am I doing wrong?

Life looks great at 1/48

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 1:52 PM

The compressor is just a cheap one from harbor freight but it works and is steady. The primer is Stynylrez. 

Life looks great at 1/48

  • Member since
    September 2012
Posted by GMorrison on Saturday, January 16, 2021 1:57 PM

Try thinner alone through it and see how the control works. Then try thinning your paint until it work right for you.

 

Bill

 Modeling is an excuse to buy books.

 

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 1:59 PM

Thanks. I'll try thinning it again. 

Life looks great at 1/48

  • Member since
    September 2012
Posted by GMorrison on Saturday, January 16, 2021 2:06 PM

I always run some thinner alone through the A/B before I spray paint. I think it helps.

 

Bill

 Modeling is an excuse to buy books.

 

  • Member since
    September 2012
Posted by GMorrison on Saturday, January 16, 2021 2:08 PM

Don't get frustrated. A/B's are tempermental creatures.

 

Bill

 Modeling is an excuse to buy books.

 

  • Member since
    November 2003
  • From: Naples, FL
Posted by tempestjohnny on Saturday, January 16, 2021 2:50 PM
Sounds like your paint may be to thick. Or your pressure is too high. With the gravity feed you should be able to spray at 10-15 psi

 

  • Member since
    May 2013
Posted by Snibs on Saturday, January 16, 2021 2:59 PM

Does your compressor have a tank and/or water trap? moisture might be a problem, same problem with two brushes seems to not point at the brushes.

Mick.

On The Bench.

Tooheys.

 

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Saturday, January 16, 2021 3:06 PM

tempestjohnny
Sounds like your paint may be to thick. Or your pressure is too high. With the gravity feed you should be able to spray at 10-15 psi
 

That's not going to work with Stynylrez.

20-25 PSI and doesn't need thinning. .4mm nozzle or bigger.

-Greg

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 3:14 PM

No tank, but I have two moisture traps on it. One at the compressor and one on the airbrush. I do not have an accurate way to monitor my psi. I just have a quick detach with a valve on it. 

I didn't think the Stynylrez needed thinning either. I did thin it though and "maybe" it sprayed a little better but would still stop and eventually shoot out a big bunch of paint at once. 

Life looks great at 1/48

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 3:20 PM

I have no idea what size needle it has. Whatever comes stock on the Eclipse HP-CS I guess?

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  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Saturday, January 16, 2021 3:46 PM

The HP-CS ships with a .35mm needle/nozzle/tip. It's a little smaller than Badger recommends for Stynylrez, but I think it would work. I've not sprayed Stynylrez through anything smaller than .5mm, so I can't say for sure.

What did you thin the Stynylrez with? Did you try it un-thinned, straight-up too?

You might want to consider adding pressure gage to your setup. It more of a bother finding the proper fittings and what not than it is an expense to be worried about.

Do you have a way to regulate the pressure coming from the compressor?

 

-Greg

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 3:59 PM

I have a pressure gage but not a regulator. There is a micro valve on my quick detach coupling but that's it. 

Ive only sprayed the primer unthinned till today. This is the first time I've tried to paint any details and haven't noticed issues till today. For thinner I have Createx Colors 4012 water based reducer. 
 

I was looking for a pressure regulator yesterday but wasn't able to find one smaller than 1/4" and I coudnt find a reducer for it. I plan on just buying a good compressor here soon. Probably on the first One that has a tank and a pressure regulator on it. 

Life looks great at 1/48

  • Member since
    August 2014
  • From: Willamette Valley, Oregon
Posted by goldhammer on Saturday, January 16, 2021 4:25 PM

Take a look at the fortress line at HF.  Quiet, plenty of pressure and an output regulator.  Has 1/4" qd's.  My 2gal was about $165, and will do other jobs as well since it's 135 psi.

  I'd put on one of the red "pumpkin" water traps, and a fine adjustment regulator.

You can find brass adapters for 1/4 npt to most anything at a Napa or other auto parts store

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 4:31 PM

I may do that on Monday

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  • Member since
    February 2016
  • From: Ice coated north 40 saskatchewan
Posted by German Armour on Saturday, January 16, 2021 6:04 PM

Have you strained the paint? there might be lumps in the primer??

Also what PSI are you spraying at?

 Never give up, never quit, never stop modelling.Idea

 

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Saturday, January 16, 2021 6:27 PM

German Armour
Also what PSI are you spraying at?

Beat me to it, I'm curious too.

-Greg

  • Member since
    October 2016
  • From: .
Posted by DasBeav on Saturday, January 16, 2021 6:53 PM

Not an AB expert but could water still be getting through the traps? Have you opened the valve at the bottom to drain it lately?  I had the same problem awhile back. Besides a good AB cleaning I got nothing.

If you use a compressor for other things, I agree with Goldhammer. I saw him mention the Fortress Ultra Quiet and bought it for 135$ on sale. Love it! Super quiet and my fillings aren't loose like after using my HF 3 gallon.(it leaked like a sieve but had a good life for a 30$ air compressor)

 Sooner Born...Buckeye Bred.

 

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Saturday, January 16, 2021 9:44 PM

I'm replacing the compressor first. No moisture in it at all but it's an old piece of garbage I've had around for years. I have a 225 gallon compressor I use for my impacts and spray guns but it's in the garage. 

I'm probably gonna get that same compressor on Monday. Then on the first I'm buying a Paasche Talon to try out. I'm sure the problem lies somewhere between the compressor and my skills so I'm just going to fix everything in between and then work on my skills in using it all. That way it's all I have to worry with. 

Life looks great at 1/48

  • Member since
    August 2014
  • From: Willamette Valley, Oregon
Posted by goldhammer on Sunday, January 17, 2021 12:35 AM

I set mine up with a qd at the ab to ab hose (NEO).

The compressor end starts with the pumpkin trap on the hose, and then a regulator with gauge, and then a 1/4 qd that plugs into the compressor. I'll set the compressor output to around 50 psi and fine tune with the one on the hose.  Only needed one adapter from trap 1/4 npt to hose.  Take the hose with you when you go shopping.

Used to do all my spraying at work, and set it up that way so I can do at home as well.

If your paint area is away from the compressor, you can just put a hose in between as an extension.

  • Member since
    April 2020
Posted by Eaglecash867 on Sunday, January 17, 2021 5:51 AM

Speaking of Paasche airbrushes, have a look at the Passche H too.  That's a bulletproof airbrush that you won't have to fuss with.

"You can have my illegal fireworks when you pry them from my cold, dead fingers...which are...over there somewhere."

  • Member since
    November 2018
Posted by oldermodelguy on Sunday, January 17, 2021 6:03 AM

You only need to thin Stynylrez about 10% to use it with a finer needle than .4. Also if left to sit Stynylrez settles with a lot of thick solids at the bottom of the bottle that I stir back in with a Badger battery powered mixer. You can't see these solids through the bottle, you need to put a stick in there to feel them. Stynylrez will thin with plain water, with ipa or my personal favorite, lacquer thinner. It sprays smooth like silk with LT. I have no idea if Createx thinner is compatible. Badger themselves say it needs no thinning but suggest just a little plain water is fine if you feel that urge. I've often shot the stuff slightly thinned with a .25 needle. I've also shot plenty of it unthinned with a .5. Recently I primed a set of 1/16 scale Model A fenders using both lacquer thinner and .7 needle, they came out smooth as silk, no need to scuff and ready for top coat. General air pressure I use is 20-25 psi using a side cup on a Paasche H. I've shot 18 psi though with the Badger 200 and side cup.. I believe Badger suggests 25 psi unthinned, which is a good suggestion.

The problem is not your airbrushes.

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Sunday, January 17, 2021 9:01 AM

So it's probably my compressor that needs to be replaced but I seem to be getting back flow in the airbrush. Bubbles in the cup. Regardless of how much I thin it. 

As for mix that prime, I put some mixing balls in the bottle and shake the crap out of it lol. 

Life looks great at 1/48

  • Member since
    April 2020
Posted by Eaglecash867 on Sunday, January 17, 2021 9:32 AM

DM1975

As for mix that prime, I put some mixing balls in the bottle and shake the crap out of it lol. 

 

 
For many primers that isn't going to work.  The stuff that settles to the bottom is really thick usually, and mixing balls will either get stuck in it or roll around on top of it.  Better to use that battery-powered Badger mixer that Oldermodelguy recommended.  I have one of those too and they work really well.
 
If you're getting bubbles in your airbrush, that means something is loose in the airbrush itself.

"You can have my illegal fireworks when you pry them from my cold, dead fingers...which are...over there somewhere."

  • Member since
    November 2018
Posted by oldermodelguy on Sunday, January 17, 2021 11:00 AM

DM1975

So it's probably my compressor that needs to be replaced but I seem to be getting back flow in the airbrush. Bubbles in the cup. Regardless of how much I thin it. 

As for mix that prime, I put some mixing balls in the bottle and shake the crap out of it lol. 

 

 Bubbles are generally a clog in the air cap, air cap or an unseated tip seat or seal ( depending on the type of seal/seat).... Can be a cracked tip too but I doubt both brushes would be cracked. They probably need a good cleaning. You can not let stynlrez dry in the tip or cap and it dries fast. I'd take the tip and caps etc and put them in a mixing bottle with lacquer thinner overnight.

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Sunday, January 17, 2021 11:49 AM

Keep in mind the Iwata is bran new. I mean this was the first project I have used it on and I just bought it the day I posted this thread. 

I pulled the Iwata apart. The tip was lose by about 1/8th of a turn. I don't know if this was ths issue or not as I haven't tried it yet. Last night I sprayed some Vallejo paint thinned to several different consistencys and had the same issue. 

Im pretty religious in my cleaning practices. I clean these air brushes like I would my rifle. I always pull everything apart after using it and detail clean everything under magnification and reassemble. 

Im rather confident in the fact that even if it's not the problem I need a new compressor. That will be done in the morning. As for wanting to get a Paasche, I think I also want to get a Badger 105 to try as well.  What can I say, I like gear! Stick out tongue

Life looks great at 1/48

  • Member since
    December 2020
  • From: Kansas
Posted by DM1975 on Sunday, January 17, 2021 12:07 PM

Also ordering a paint mixer. 

Life looks great at 1/48

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, January 17, 2021 12:19 PM

DM1975
Keep in mind the Iwata is bran new. I mean this was the first project I have used it on and I just bought it the day I posted this thread.

Just FYI, you can successfully clog your nozzle/tip in about 20 minutes with Stynylrez. As mentioned above, it dries fast. All I'm saying is your airbrush can be 20 years old or 20 minutes old, doesn't matter if you don't clean it out right away after spraying Stynylrez.

Smile

-Greg

  • Member since
    April 2020
Posted by Eaglecash867 on Sunday, January 17, 2021 12:23 PM

DM1975

I pulled the Iwata apart. The tip was lose by about 1/8th of a turn. 

That's enough to cause the issues you were seeing.  Cool

"You can have my illegal fireworks when you pry them from my cold, dead fingers...which are...over there somewhere."

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, January 17, 2021 12:55 PM

Eaglecash867
That's enough to cause the issues you were seeing.

Indeed.

-Greg

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