White glue as varnish?

Discussion in 'Tips & FAQs' started by MikeBer, Feb 26, 2012.

  1. MikeBer

    MikeBer Member

    Quite by accident, I ended up covering a card part with white glue (PVA).
    When it had dried, it had dried clear and the colours of the part were not affected but I had a clear protective skin over the part.
    I then tried it again on another printed part but this time slightly diluted with water. It painted on perfectly (it looks unsightly until dried) but it dried to a smooth, clear, "gloss varnish" effect.
    This is great for reinforcing the glue lines and protecting the coloured ink on the parts.
    I don't know the long term effects of the glue - yellowing with age, etc, but I am going to use it to protect my models.
  2. Zathros

    Zathros Guest

  3. MikeBer

    MikeBer Member

    Here is a quick sample that I did - left to right - original - PVA applied - finished wheel.
    I only diluted the PVA with 1 drop of water. Diluting it more will result in a much smoother finish.

  4. Zathros

    Zathros Guest

    To be honest, I like the first picture best. Of course, that is just my opinion and in a picture, you see things differently. When I look at a model, I like the surfaces to represent as close as possible, the sheen that the original had. The effect may look better on the wheel part (rubber) only, and on pieces that should be chrome or brass. Hard to tell without being there. :)
  5. Haereticus

    Haereticus Member

    I was going to say that it might look particularly good if you just did it on the rubber. You'd want to make the coat as even as possible.
  6. This is interesting.
    I tried this before on some other kind of handi-craft years ago, and it is probably a good option for paper models.
    Will see your experiments :)

    That's true for some glues. But not all ;)

    When I worked in book binding we used to use white PVA glues to glue the spines of the books prior to the actual process outer binding. I notice that even after several layers of white glue, and if let to dry properly, they remain transparent for several years without yellowing.

    In older books there was yellowing and the glue became crystalized. But with the newer glues that didn't happened. I still have some samples of book spines I bound in the mid 1990s, and they are still very transparent and flexible.

    But I guess it depends of the brand and the specific way they create the glue.
  7. Zathros

    Zathros Guest

    If you were binding books, you were working with some expensive glue (I would hope). Without knowing what brand or make, there's no way of repeating what you were able to do. The stuff they sell around here is horrible. I think that's because most of it is edible kids glue!! Yum Yum!! :)
  8. MikeBer

    MikeBer Member

    Thanks, Zathros for the positive criticism, I tend to agree with you about the tyre. I did another experiment, this time diluting the glue 50/50 with water.
    I painted it on the inner wheel and it dried to a very nice Satin/Matt finish,
    I coated the tyre with almost pure glue.

  9. Zathros

    Zathros Guest

    I can't wait to see the rest of the model! :)
  10. I believe acrylic artist's medium is very similar to PVA, but thinner and designed for brushing on, of course. If you wanted something that's a better bet for longevity that might be a good replacement. I keep a jar of acrylic gel medium around for various uses with models and sometimes as just a clear coating. I haven't tried it on a card model though. I might test that out.

  11. Zathros

    Zathros Guest

    I have a bottle of Liquid Electrical Tape. I always thought this would looks for rubber hoses, wheels, etc, as just before it dries, it becomes impressionable. I always wondered if tire treads could be pressed in, or if painted on thinly, maybe it could enhance paper treads. Just thinking with my fingers! :)

    P.S. MikeBer, I think it is excellent and shows real character, when a person posts and asks questions, and make the exchange of ideas pleasant. That goes on a lot here, and you continue this tradition in the best possible manner! :)
  12. MikeBer

    MikeBer Member

  13. Zathros

    Zathros Guest

    That will be fun to watch! :)
  14. DanBKing

    DanBKing Active Member

    I think you guys in the States call it "Future"; it is an acrylic floor polish in liquid form, that dries to a very tough, resistant gloss finish. The plastic modelling community swear by it, and in my experience, the things that you can do with the stuff you can write a book on.
    I don't know if it would be suitable for card, but it would be worth an experiment.

    Just thought I'd add my 10c worth..... :)
  15. Banyon

    Banyon New Member

    Nice tip! Gonna put that into my kitbag for the future.

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