About a year ago, a puddle of Windex spilled into one of the corners of my bay window. Before I noticed it, the polyurethane finish was damaged. Now that I'm getting around to restaining and finishing it, I'm running into two problems.
A picture of the corner is posted here -
Time - 7/30/08, 2:46 pm Subject - Bay window floor Sender - Ray K
I used a varnish remover called Citristrip, which rinses with mineral spirits.
The first problem is the black stains that look like mildew or mold. I put a few drops of full strength ultra Clorox on them; it had no effect. I've tried sanding them away, no luck. If mold or mildew, they are deeper than I wish to sand. The same type of stains also are present, to a much less degree, at the opposite corner (which was never damaged by Windex or any other liquid).
(The window is located in Central New Jersey, subject to a yearly temperature range from about zero to 100F. There is insulation below the floor.)
The second problem is the raised wood grain, even though the stripper was rinsed with mineral spirits, not water. Even using a 150 sandpaper, I can't get rid of the raised grains. In fact, using sandpaper or even just just rubbing with a dry paper towel worsens them.
Any suggestions for dealing with these problems other than - horrors - paint? I don't have any experience with applying veneers.
Thanks,
Ray