I recently completed this cabinet for my fishing gear. Material is reclaimed pine from an old barn. All 1X12 stock; some of it was a true 12" wide when I started working it. All boards were weathered on one side.
I used the steel wool/vinegar for stain (aka "iron acetate").
Exterior:
Interior:
The exterior of the cabinet is 100% from the weathered side of the boards. The interior was a mix, but was largely fresh surfaces from planing the non-weather side of the boards.
The weathered sides tended to come out much "greyer" while the interior surfaces of fresh wood had more of a brown tint.
I've used iron acetate on many pieces over the years. I use it when I'm looking for a rustic or "country" style finish. I put a poly topcoat over these pieces. Here's a headboard I completed from the same stash of barn boards:
I've learned a bit over the years about using iron acetate. Most of these experiences mirrored some other mentioned above.
- I put one pad of #000 steel wool into a quart of vinegar. I use regular white distilled vinegar from the grocery store; cheap stuff is good. I let it soak three days. I used #000 because I didn't have any #0000 on hand when I mixed it up. I have let the stuff soak for much longer, but if it goes for a week or more, I think it gets very messy with no improvement in performance.
- After the soak is done, I pull out the remains of the steel wool pad, and then pour the liquid through a coffee filter into a clean container for storage. It can be used immediately, and I have used it successfully several weeks later. However, it needs to have been strained before storing it for any length of time.
- As mentioned by several people above, the coloration of the iron acetate depends on the reaction with tannins in the wood. Different species have different levels of tannins. As Vicki said, I used a strong brew of black tea to coat the pine wood cabinet prior to applying the iron acetate. I didn't use any tea on the headboard. I don't know why the headboard darkened so much, but it did. I think the tea helped even the color on the pine cabinet, both inside and outside. For tea, I use regular Lipton's tea. No need to go all fancy.
- The topcoat on the headboard is Minwax Poly that I diluted to a wiping poly. The headboard continued changing color over time as the poly yellowed a bit and seemed to draw out a rust color onto the old paint around cracks on the bare wood surface. I don't know how the poly will change over time on the fishing cabinet because I just completed it in February.
- If you want a stronger reaction from the tannins, you can use powdered tannins like those used for winemaking. That is available from a fermenter's supply house or online.
- I like iron acetate because it's a relatively safe product. You can use it with your bare hands, but be prepared for staining of the skin. I use nitrile gloves.
- Recommend you try a test piece first before putting the iron acetate on your actual project. As mentioned by others, the actual color may vary board to board. I really do think the use of the tea helped even out these color variations.