Dan Hilyer said: Did I understand that you are using sepia ink to weather the aluminum panels? Does it come in different colors? Do you do any prep work on the panels before you apply the ink? Where would one look for said ink? Sorry for all the questions, but this will be my first attempt at weathering aluminum or anything else for that matter.
Thanks to everyone for your support on the build and for your advice on the pin nailer. I’m sold and I think I’ll try the tank system.
Dan, I use sepia, brown, blue, and black drawing inks on the pine boards to color and weather them. Higgins is a good brand; John C. mentioned using Pelikan Ink, another good brand. Just be sure to get water-based ink, not lacquer/shellac-based like most of the French inks. Lacquer-based ink is a mess to deal with, difficult to thin, and, more importantly, it leaves a gloss look, which obviously isn’t right for wood staining, no no no. Any art store will have the inks you’re looking for (I think craft stores have them too maybe), fountain pen inks are fine too if more expensive, or, if you want to save some money, go online at Dick Blick http://www.dickblick.com/products/higgins-calligraphy-ink/
I wouldn’t worry too much about the cost because a small jar of ink goes a loooooooooong way, because you are seriously watering it down to stain wood, like ten to one or something.
Inks will not stick to the aluminum panels; it just beads up. I use artist paints. No preparation necessary, just paint away.