Black stains on Maple wood work
I'm removing old shellac from the maple trim in our 1915 apartment. (Paint came off pretty well with a heat gun, thanks to the shellac). Denatured alcohol has worked great so far, but now I've hit an impasse with several black-stained areas (windowsills mostly). It almost looks like the wood was burned, but it's probably just 90 years of city soot/rain/pollution/neglect. I think wood bleach might be the answer, but does anyone have other suggestions?
My plan is to either re-apply amber shellac or a very very light colored stain/poly, but first I want to get the wood as uniform as possible. I will need to do a quick steel wool/scotchbrite sweep with Rock Miracle or Zip Strip to get the paint remnants off, which might help with uniformity. What do you think?