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Clear over old art

Discussion in 'General Airbrush Discussion' started by J000seph, Mar 10, 2019.


  1. J000seph

    J000seph Detail Decepticon! Very Likeable!

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    I have a question. I have a painting I put aside for a couple months that I want to finish and clear coat. I’ve heard that water based paints can absorb moisture over time if not cleared right away. Is there something I can do to prevent problems with clearing it? Or am I worrying too much about it? Heat gun? It’s Createx Illustration on a plastic motorcycle tank blank display. I want to finish painting it and apply a 2k clear.

    698B5F3D-AEFB-425A-84BE-4AD6B803FD26.jpeg
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  2. Vladimir

    Vladimir Detail Decepticon!

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    What I would do. If you have only heat gun, then first step would be heating from inside the blank, that would get out the moisture off the paint layer, if any would get into your paint (strange thing to hear that paint absorbs moisture). If its not possible to heat from the inside, then carefully to heat outside.
    After the work is done, I'd give mist coat of transparent basecoat first, then time for the reducer to evaporate, then the clearcoat.
    I think you're right, too much worrying.
    BTW, work is well worth being finished!:thumbsup:
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  3. J000seph

    J000seph Detail Decepticon! Very Likeable!

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    Thanks, I was also planning some sort of intercoat before the 2k. I won’t worry too much now. :)
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  4. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    First of all, damn good work. I am always surprised how many great airbrush artist living on this forum.

    Hair dryer? Heat gun seems kinda hot -.-
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  5. J000seph

    J000seph Detail Decepticon! Very Likeable!

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    I’m unfamiliar with this subject. I’ve only heard of problems with 2k clear crackling, etc because of waterbased paint absorbing moisture.
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  6. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    I don't have experience with 2k, but I know they use heat gun in screen printing for curing color on t-shirt. I also know airbrush artist use hair dryer for curing paint. Reading t-shirt forum I noticed guys could over-cure their t-shirts with heat gun, never heard about airbrush artist over-cured with hair dryer though.

    I think the main problem with heat gun imho is the lack of temperature control over the whole ''piece-in this example t-shirt'' and to much temperature. When I was looking to buy heat gun for myself I found only few of them, where you could set temperature on the settings you like and this would not happen.

    Here is an example:
    https://www.ideo.si/vecnamenski_feni/fen_na_vroc_zrak_HG651CK_80_650_186_C_MAKITA

    heat guns go to 600 degrees celsius... Even more. Depend of the gun. On the other hand hair dryer in my theory would be safe. I doubt hair dryer goes to 50 degrees? Just brainstorming J000seph...

    edit: I don't have a clue how temperature settings looks on the cheap guns...
    Last edited: Mar 10, 2019
  7. twood

    twood Elite Member! Elite Member! Very Likeable!

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    They say you should not dry Createx paint with heat. ....Air only....
    I would finish painting, then use trans base, let that set and clear. Remember to put a dust coat (or two) before any flood coats. If you just flood coat, it pulls the waterbase paints and causes cracking and crinkles....I have found out the hard way....
    Love it by the way and glad you are going to finish it...lol
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  8. J000seph

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    That’s what I always heard and read on their tech sheets, except for their T-shirt paint. But I’ve seen a couple times now concerns with waterbased paints absorbing moisture over time if unprotected by a top coat. Which doesn’t make sense to me if the paint is “cured”.
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  9. Vladimir

    Vladimir Detail Decepticon!

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    I can see worrying about the heat gun. There are different types of them. Mine has special mode for curing paint (first switch on the handle). The second click of the switch is providing mode for adjusting any temperature up to 660 degrees of Celsius. Besides, there's always distance between the gun and the paint that leads to resulting temperature of the heating . So, imagination and professional tools would work;) I use professional BOSCH with LCD display, so every time I can see the temperature.

    Reading such post, I become glad once more that I can use urethane paints:) No headaches with the process.
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  10. erwin de pan

    erwin de pan Mac-Valve Maestro!

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    This is the opposite of what I think.
    In theory, a normal acrylic house paint is completely dry after 2 weeks.
    I expect more problems if you varnished too early.
    If you put new layers on it, you bring in more moisture than it is probably now.
  11. J000seph

    J000seph Detail Decepticon! Very Likeable!

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    Maybe the sources I’ve heard this from are not reputable. I assumed since I had never heard of it that they knew what they were talking about.
  12. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    If createx needs only air drying, what about fan?
    [​IMG]
  13. J000seph

    J000seph Detail Decepticon! Very Likeable!

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    It dried fine last August :)
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  14. erwin de pan

    erwin de pan Mac-Valve Maestro!

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    I am not saying that they are wrong.
    If it is a metal tank and it is outside in the rain. Is it true what they say.
    The paint itself does not attract moisture but leaves moisture through what can give problems with the underlying layers.
    But if your tank is inside, for example, the sheet of paper next to it is wetter than the tank itself.
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  15. Robbyrockett2

    Robbyrockett2 Air-Valve Autobot! Very Likeable!

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    Createx is actually a waterborne not water based. By itself it is very water resistant ( can go in a washing machine).

    CI takes a little longer than wicked to get it's water resistance, but it gets there.

    I wouldn't have any worries except accumulated dust.

    The only context I can think of with your statement that would be true is with truly waterbasec art paints.

    I might give it a day or two if it was outside getting soaked, but just because of porosity.
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  16. J000seph

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    Interesting. I always thought waterbased and waterborne were the same thing. That makes much more sense to me. I was having a difficult time wrapping my head around cured paint absorbing moisture.
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  17. Robbyrockett2

    Robbyrockett2 Air-Valve Autobot! Very Likeable!

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    Waterborne uses water as a carrier but it's not the binders solvent.

    Water base, water is the solvent.

    The tricky thing here is stuff like latex, where it's water based but technically sort of an enamel, so it won't re absorb water unless it's held underwater for weeks.
    Last edited: Mar 12, 2019
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