Chipped/Flaking Paint Using Crackle Medium

[marc_reusser]

Interesting SBS experiment by Rob Feirrera on the subject:

http://www.armorama.com/modules.php?op=modload&name=SquawkBox&file=index&req=viewtopic&topic_id=132946&page=1


Marc

[finescalerr]

This might be something one could use on wood, too, right? It might be kind of a Chuck Doan² approach. -- Russ

[michael mott]

Marc thanks for the link, very interesting work I think I will have to give that a try myself. Just the thing for a rusting old Porter air loco.

regards Michael

[marc_reusser]

Russ,

I don't know about it working on wood. One 'wood' need to experiment, but I think it would have problems, unless the wood already had a coat/layer of paint or such, as there is a good chance that the wood would absorb most of the medium, thus rendering it ineffective. There is also the possible issue of the wood at the model scale being more "elastic" than a plastic surface...thus it would not allow the medium to react (shrink) like it needs to. [a crackle medium generally works by shrinking more/differently than the paint that is applied over it...thus causing the cracking].


Marc

[lab-dad]

I have tried it on wood and like Marc suggested, it does not work as effectively as on a less porous material.
Sealing the wood wood help.
-Marty

[jacq01]

This is a technique already used in the 19yh century by artists to " romanticise" paintings or objects.
Goolge for "crackle medium ( weathered) " and it gives many sites with tips and hints on use with various undergrounds.

Jacq

[marc_reusser]

Was browsing through the web, and came across this on a German forum.....the idea is not original....I think it is the method Marcel Ackel employs.....but the results that were achieved by this modeler are not bad.

The original item:


This was then stained with an Oak stain (being on a EU forum it was likely water based stain). The entire piece was then covered with masking fluid (brush applied)



The whole thing was then brush painted with white "emulsion paint"? (Dispersionsfarbe).....and then peeled using masking tape.





....I am assuming the scale on this was 1/35, or larger.


M

[finescalerr]

A variant of the "gum arabic" (rather than rubber cement) technique? -- Russ

[marc_reusser]

A variant of the "gum arabic" (rather than rubber cement) technique? -- Russ

Yes, in a basic sense (since the Gum Arabic wont work on wood due to absorption).


M

[hguent2003]

Yes, in a basic sense (since the Gum Arabic wont work on wood due to absorption).

M

Marc,

may be I got it wrong but as far as I know Marcel is using Gum Arabicum when he weathers wood. He is only using watercolors to stain the wood prior to use the Gum Arabicum as a barrier layer.

Harald

[marc_reusser]

Harald,

You are correct...I was mistaken...I was sure he used the masking solution, but I found his fence thread on Modellboard.de, and he notes he used Gum Arabic.


A photo of Marcels fence for those interested:






M

[marc_reusser]

HA...I knew I was not going completely senile  ...apparently he uses the masking solution as well.

Here is a photo from one of his SBS threads:




...here is the link to the thread:
http://www.modellboard.net/index.php?topic=22388.0


M

[Mr Potato Head]

I know that crackel medium works on wood becasue "toll" painters use the stuff. There needs to be a coat of sealer and paint on the wood, then the medium, and then a second coat of paint, the medium works like gum Arabic in that its dis-simular paint. Then toll painters put a glaze over the crackled finish and then seal it. I have tried to get very small, or scale cracks, but so far I have been unsucessful    I will be trying a new method, or mix of methods on my new project, i will share my results.
Gil

[darrylhuffman]

Gil, when will you be sharing?