Cat puke -- not at all off topic. . .really
Dave Mount
>Our dining room table is an antique (1905) Mission-esque round pedestal table with a spectacular QSWO top. Finish is shellac.
A couple years ago, I came downstairs in the morning to find that one of the felines that graces our lives has vomited on the table during the night. When I clean it up, it becomes clear that the puke was sitting there for a while, because it has eaten away all the shellac (shellac is digestible, after all). I washed the area with water as best I could and cussed a little to make myself feel better (the cat was unimpressed).
Couple months later, I get up the nerve to dive in and repair the damage. I filled in the damaged spot with some new shellac, sanded it more or less flush with the surrounding finish, brushed a little straight alcohol around to feather out the repair, then put a really thin coat of shellac over the whole table to blend and freshen the whole top. Looked great when I was done, couldn't tell I'd been messing with it.
Several months pass, and I notice that I can start to see that spot again. Not dramatic, but I can see a light area. Worse than that, I convince myself that the glue joint that runs through the spot is a little offset (hmmm. . .hide glue is digestible too. . .).
So it appears that kitty's gastric enzymes are still hard at work in the table, not only working on the finish, but perhaps on the glue as well.
Anyone have any good suggestions for how to deal with this? I can repair the shellac again, that's not that big a deal. But if I don't get those enzymes stopped not only will the repair not last, the glue joint is in danger, which would be a far bigger deal.
Thanks for any (useful) suggestions,
Dave