On Nov 28, 1:12 am, observer wrote:
Recently I had to re-stain it and put another coat of
polyurethane on it but after the polyurethane dried I realized that
the stain ran in a couple of spots. What is best to deal with those
runs, steel wool or sand paper 220 grit?

The stain ran? Or the urethane?

If the stain, strip the urethane and read the back label on the stain
can. Use whatever is recommended for cleaning. You may have to reapply
stain if too much is pulled off.

If it's the urethane, sand the runs and then sand the entire door.
Recoat with urethane.

Also if I don't like a spot where I stained and poly'd over that, what
is the best way to prep that spot to stain it again and reapply the
polyurethane over that ?

Have you thought about stripping the whole door, fixing the stain
spots, and then applying another whole coat of stain?

You have to strip the urethane to fix bad stain spots, preferably a
larger area than the bad spot of stain. When you restain the spots, be
cautious and leave the stain on for just a short time before wiping
the excess. You can always re-apply if it's too light.

You may also want to invest in a good worklight. I don't envy you --
fixing stain after topcoat is applied takes a fine touch. And you'll
want to feather the edges of the urethane before applying another
coat.