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compressors and moisture filters

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  • Member since
    June 2009
  • From: Cedarville, AR
compressors and moisture filters
Posted by redshft1920 on Friday, November 4, 2011 12:00 AM

Hello, not much of a painter, but honestly trying to learn more. I discovered that my remaining Alclad Black Primer had some moisture in it recently, so I knew I had waited long enough to get a moisture filter. Without telling me all that I did wrong, and I got by with it for about 18mos [TOO long], is there anything anyone can contribute to letting me in on whether there's anything I can do for this remainder bottle of black? I already bought a new 4oz bottle, but I have about an ounce left of the first one I bought in spring of '09. Probably just good for touch-ups or anything not intended for show or even even display, right? I'll find places to use it for practice.

I bought a simple, cheap, in-line filter and moisture trap. I assume I didn't throw my money away completely, I only need it to work well enough to get myself up a little bit on what any minimums there are regarding these things and how or where that info might be found. Can anyone contribute something to do's-and-don'ts? Minimal requirements, brands or types to avoid. Anything will be appreciated.

Thanks,  Bob

Bob Moody in Cedarville AR

  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Friday, November 4, 2011 9:16 AM

Not sure I understand.  Do you have water in the bottle, or does water show up in the finish when you airbrush?  A moisture trap prevents the later, not the former.  I think a moisture trap is a good investment.

Did you have a large amount left in the airbrush bottle and pour that remainder back in the Alclad bottle?  That is the only way I can see you'd get water from compressor back in the Alclad bottle.  I generally try to estimate how much paint I will need for an airbrushing session, to eliminate pouring paint back from airbrush bottle to source bottle. I must admit, however, that since Alclad is already thinned, ready to apply, I have poured excess back in source bottle (never gotten water from doing that, though).

Don Stauffer in Minnesota

  • Member since
    October 2007
  • From: Scotland
Posted by Milairjunkie on Friday, November 4, 2011 9:53 AM

Ditto Thats what I was thinking - if you have moisture in your paint, no amount of moisture filters will help you there?

Or did you have moisture issues when using the primer? If that's the case, the moisture is likely to be coming from your compressor, rather than your paint - You possibly already have a combined filter regulator on your compressor & adding another will no doubt help.

If you find that you are still getting occasional problems, a clear air hose will give you a little bit of advanced warning of water coming down the line & if the compressor is being overworked, it will become hot & increase the amount of moisture created....

  • Member since
    June 2009
  • From: Cedarville, AR
Posted by redshft1920 on Thursday, November 10, 2011 12:41 AM

That's a new one....too hot or overly hot yields more moisture trapped by the compressor trap. I can buy that due to WHEN the moisture was first noticed, in the middle of summer. However, I did not paint after mid-May and we hadhad extremely wet conditions for nearly 5-6 weeks just before I stopped regular painting. It likely accumulated and I didn't notice it and probably added it to the last 1/3 of the bottle of Alclad II. I just got a new bottle and now it's in a plastic bottle! I'll watch it from now on and give the trap a drainage punch after each use. The little moisture trap I added on needs a "T" fitting so it hangs down instead of horizontally placed as it is now. It may still work but it looks funny and I can't leave it that way....he he.

Thanks for your help gents.....

Bob

Bob Moody in Cedarville AR

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