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Cleaning HVLP gun

PaulBinCT | Posted in Tools for Home Building on June 30, 2004 06:57am

Howdy all…

A little while back I was at a friend’s place spraying some new cabinets with my HVLP using waterbased poly.  Seems the seal that keeps the finish and the air from mixing in the gun failed and before I knew it, the gun was full of poly where it didn’t belong. By the time I got home it was purdy much hardened so I disassembled the gun and put it in a bucket of lacquer thinner.  I ummm forgot it until today when I find the poly has turned into an exact replica of rubber cement.  Any suggestions on how best to clean this stuff out of the gun body?  Got the air horn, tip etc pretty well cleaned out but the stuff is just packed into every crevice of the gun…

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Replies

  1. Frankie | Jun 30, 2004 08:24pm | #1

    More laquer thinner. This time don't allow it to evaporate.

    Then use wood toothpicks or bamboo chopsticks to get into the nooks and crannies. For the really tight spots use thin brass wire. This is a TLC job so put a good CD in the stereo and enjoy the attention to detail.

    F.

    1. User avater
      PaulBinCT | Jun 30, 2004 08:27pm | #2

      That's what I was afraid of Frankie :(  I didn't let it evaporate btw, it's in a covered "pot" but this stuff sureeeeeeeee gets gooey...

  2. User avater
    Qtrmeg | Jul 01, 2004 02:46am | #3

    Hmm, maybe acetone would be a better solvent for this.

    ?

    1. Piffin | Jul 01, 2004 04:01am | #4

      Or naphtha or carbuerator cleaner? 

       

      Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

      1. User avater
        Qtrmeg | Jul 01, 2004 04:51am | #5

        Naptha is just a high flash thinner. Carb cleaner? I dunno.

        Acetone will cut aqua finishes, so if he gets the goo out it might do the trick.

        Or he could just give up and send it to me. I'll nuke it with everything I have in the laboratory. As Red Green says, If I can't fix it, I'll fix it so no one else can.

        1. Piffin | Jul 01, 2004 06:30am | #6

          I use the acetone for most high potency cleaning like this, but the reason I thought of the carb cleaner is that it is made to cut seared on varnish from the gas. I had a pair of plastic lenses in my glasses with the gaurantee against scratches etc. I was using the Paslode cleaner for my guns and splashed some on the lens and it melted dimples into it, or into the coating on the lens.

          So I took them in for replacement and said that I had splashed acetoen on them since it had been my undersanding that Acetone was the main ingredient in this kind of cleaner. She was suprised to hear it and told me that they used acetone to clean the lenses in the optical shop abnd that I must have had something more potent in the splash. 

           

          Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

  3. bill_1010 | Jul 01, 2004 06:48am | #7

    MEK, toluene or acetone would be a stronger solvent then laquer thinner.  All are nasty solvents so use in a better then well ventilated area.

    1. caseyr | Jul 01, 2004 07:00am | #8

      Goof off comes to mind:

      On the original Goof Off (stolen from the Web page): 

      "Used by more painting contractors to remove dried latex paint than any other brand. Goof Off quickly and easily removes dried latex paint splatters, drips and overspray from furniture, hardwood floors, finished cabinets, paneling, windows, woodwork, carpeting, linoleum, tile, formica, vinyl floors, many fabrics, brick, metal, fiberglass, concrete, stucco and more.

      "Unlike strippers, Goof Off selectively removes latex paint and not oil-based paints. Goof Off is also excellent for cleaning spray equipment, removing paint and tar from automobiles, and cleaning tools, determining whether existing surface paint is latex or oil based, and removing paint from clothes.

      "Goof Off 2 is a water-based dried latex paint remover. Designed for those who are sensitive to the odor of the original Goof Off and for use in odor-sensitive locations such as offices, restaurants, hospitals, schools, nursing homes etc."

      http://www.goof-off.com/goofoff/PRODUCTS/goofoff.html

      However, it doesn't say anything about HVLP paint equipment...

      Edited 7/1/2004 1:01 am ET by CaseyR

    2. WorkshopJon | Jul 02, 2004 11:05pm | #12

      "MEK, toluene or acetone would be a stronger solvent then lacquer thinner."

      WmP,

      Lacquer thinners normally can contain all those (as well as many other solvents) to varying degrees depending on the blend.  Those formulated for spraying in cooler temps tend to have more acetone.

      Jon

  4. TomT226 | Jul 01, 2004 01:43pm | #9

    Go to your nearest pro paint supply house and get a gallon of "spray gun cleaner."

    I don't remember the name of it, but it takes everything off and out of your gun. Take all of the rubber and plastic off, 'cause it'll eat that too.  While you're there, get a gun cleaning kit. Has lots of good wire brushes of all sizes, plus orifice cleaners.

    1. User avater
      Sphere | Jul 01, 2004 02:51pm | #10

      depending on the finish involved..The hydro-cote I know the formulation for has , among other nonessential things..ethylene glycol, and DB, a diabasic<?> ether.

      Armed with that info, and the fact that most folks can't get DB, MEK is goin to get ya the closest to joy.  

      Spheramid Enterprises Architectural Woodworks

      Repairs, Remodeling, Restorations. 

      1. User avater
        PaulBinCT | Jul 01, 2004 03:20pm | #11

        Thanks for the advice folks... I'll let you know what proves to be the most effective "de-goo'er".

  5. WorkshopJon | Jul 02, 2004 11:09pm | #13

    Paul,

    IMO, soak the whole shmeel in blend of liquid SOLVENT based paint remover and generic [wash] lacquer thinner.  Seems to work quite well for me.

    Jon

    1. WorkshopJon | Jul 02, 2004 11:16pm | #14

      MSDS of a typical "wash thinner (PPG DTL-10)

      ISOHEXANE

      1-METHOXY-2-PROPYL ACETATE

      TOLUENE

      N-HEXANE

      NAPHTHA

      ISOPROPYL ALCOHOL

      ACETONE

      3-METHYLPENTANE

      As one can see, lots of stuff in it.

      Jon

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