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Comments
Now that my seminary classes are finished for the term, I am taking the summer off so I dangerously have some extra time. Over the last few days, I have been the "mad scientist" setting up a series of experiments to see if I can chemically enhance the aging process of acrylic paint on wood. I naively thought that perhaps I could get the paint to turn scaly, but I did learn some things.
I bought some craft sticks, grained them, put some knotholes in, and tried various combinations. One was a "pre-treatment" using a homemade blend of mineral spirits and boiled linseed oil. The lower stick in each of the pairs in the photo had that pre-treatment and the top one did not.
The other variable was the "post-treatment"; the top set had denatured alcohol brushed on, the second set had denatured alcohol sprayed on, the third set had acetone sprayed on, and the last set had mineral spirits sprayed on. Lost yet? :-)
I rubbed them all with an artificial steel wool (perhaps too much pressure in some cases).
My conclusion is that the pre-treatment seems to make a difference, and the mineral spirits "top dressing" may also be helpful.
This was also a great way to get a little experience with the brushing technique and I learned that I need more practice with that.
You can also find other quality pastel chalks of other colors that you can use for final detailing....just make sure they are not an oil or pasty type base...as the alcohol with not work well on them. Sticking with the Rembrants ais a good idea in the beginning.
i like both.
By adding siccatif ( I don't know the word in English, but it is a drying agent) the oil dries faster. It is used by oil painters.
Here is a sample of the boards for the first part of the foundry - the Pattern Shop. I feared covering up the graining et al when I painted. I'm not sure if this is the right look, but I am pleased with it. It does look like I went overboard on the saw banding, though.
Thanks Robert for the warning about Boiled Linseed Oil. I wonder if combining it with Mineral Spirits will help it dry faster. I am hoping to start gluing the boards to the cardboard form next week, so I'll find out if my "mad scientist" approach did more harm than good.
Your combination of wood grain weathering and saw banding looks good. Mixing in just weathered boards helps make the saw banded boards stand out very well. Possibly add more of the just weathered boards to the mix for your wall and see if you like that look.
Later, Dave S.
Rick
Finally something to show for my efforts. I do feel a bit like I am posting a crayon scrawl on the refrigerator in comparison to the fine work of others, but at least I am making a bit of progress.
Rick
I had difficulty getting a great rust effect, but members of this forum gave me a number of techniques that worked for me. Phil