Kathy wrote:

Any chance anyone had luck using any of this stuff to remove dark
streaks caused by rain coming through a window? We just bought a
house and at some point water leaked through onto the pine paneling
through a couple of the windows. Not sure if it is mildew, but its
definitely some kind of dark streak. I'm going to try the dollar
store cleaner method, but a contractor also suggested we use
something like tilex. Trying to figure out what I should do!

It's not possible to give you an accurate answer Kathy, since we don't know
the nature of the dark streaks. We don't know what kind of sealant (think
varnish or some similar product here), has been applied to the knotty pine -
if any, or what the condition of that sealant may be. It is possible that
the stains penetrate down into the grain some amount, in which case a
cleaner may or may not work to remove them. It may be that the only way to
remove them is by sanding through them. I think you're faced with a
try-it-and-see approach.

--

-Mike-