If you're interested... This is from a test (just on some scrap pine) just to see how different tannin bases affect the process. In the picture : tea (T), coffee (C), Red wine (R), white wine (w), and no base (X). (The "no base" section has some weird shading in it because it wasn't doing much, so I tested to see what would happen if I put tea on *after* the vinegar. A little change, but not much. ) Then the vinegar solution went on... it was pretty cool to watch. The second picture shows the tea and coffee bases next to a board that I just washed with india ink/water. In that photo, the tea base looks pretty splotchy because I wiped it in the center with some water to see if I could stop the process or if it would just keep going. It did stop. There is also a streak in it because I put a brush of the vinegar solution to see if it would kick back in. It did.
The real crazy thing is that you can reverse the process. In the third picture, you can see where I wiped it with lemon juice (all my limes were victims of margaritas...). So I figure worst comes to worst I can "erase" it and try something new!
