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Acrylic paints are made with a carrier of acrylic resins, which in turn are made from acrylic acid, so acrylic paints are acidic too, but less so than oil paints. Oil paint has linseed oil as a carrier, which has acetic acid. There is a long article on "lead rot" at this link:

 

http://www.navsea.navy.mil/nswc/carderock/pub/cnsm/lead/lead_01.aspx

 

The long and short of it that primering the model first will help preserve it, but nothing lasts forever. This may explain why paint on some of my oldest models is easily rubbed off as dust, even though I primed before painting and clear coated after. Or maybe it was just the cheap primer I used back then. ;)

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Acrylic paints are made with a carrier of acrylic resins, which in turn are made from acrylic acid, so acrylic paints are acidic too, but less so than oil paints. Oil paint has linseed oil as a carrier, which has acetic acid.

So far as I know, linseed oil does not contain acetic acid. It is composed, I believe, of five fatty acids: linolenic, linoleic, oleic, C18 stearic, and C16 palmitic acids, with the esters of glycerol (C3 alcohol with three hydroxyl groups).

 

The traditional white oil paint, flake white, is made from lead treated with acetic acid and retains a vinegary smell. (Yes, the traditional white pigment is "lead rot.")

 

Acrylic paint may be based on acrylic acid, but the acrylic is treated in such a way as to make the paint neutral or alkaline in pH.

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Anne, nothing useful to add but echo the other sentiment: a beutiful take on a so so mini to turn it into a piece of art. I will be filling the idea away for use on some of my older less detailed minis.

 

@Pingo: your chemistry looks correct. The other issues are what additives are added. Much like the additive mix and hardener ratio on bones changes them from squishy flexible (most) to super hard like Wyrmgears wings (like plumbing PVC).

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@Pingo: your chemistry looks correct. The other issues are what additives are added. Much like the additive mix and hardener ratio on bones changes them from squishy flexible (most) to super hard like Wyrmgears wings (like plumbing PVC).

It's generally the other way around.

 

PVC is naturally (if that word applies) rather hard and brittle.

 

Most PVC is modified by adding plasticizers rather than hardeners. The commonest plasticizers for PVC are phthalate esters, which make it softer and more flexible.

 

These, by the way, are the same phthalates that have alarming effects on the reproductive health of animals exposed to them at a young age or in vitro. They are also chemically related to phthalo green and blue, two common pigments which have been demonstrated to cause horrific changes in developing chicken embryos, although they are technically considered nontoxic to nonpregnant adults.

 

Cough. Back on topic. Anne, it's marvelous.

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Thank you everyone for the kind words, and also good information on health! I had you all in mind yesterday as I was doing some oil painting outdoors, (off off topic: I started a local plein air paint group). These discussions made me more aware of what I was doing, instead of my usual space cadet paintmode. ::): I'm now looking at my travel paintbox a bit more soberly.

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Wow, what a pleasure seeing one of these painted, and painted so well. I love Grenadier figures all the way back to the beginning. I can tell a lot of creative thought went into the design and the treatment, and result is fantastic, a true one-of-a-kind!

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I am looking for a seller, and want to buy Battling Behemoth The Great Griffon and Giant Dragon. Please get in contact with me on scm05@live.com if you are willing to sell. It does not matter how long this has been posted for...... Steve

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