No, you cannot just brighten. You will need to remove and that would be a stain stripper and then followed by a wood brightener. Use the Restore A Dec...

At this point, you should just leave it alone until next Spring. Strip and redo at that time.

Might want to try and reclean and then brighten the wood after.

It is not an old stain as there is one side of the deck that has never been stained and it has the same black spots.

Looks like old stain that needs to be stripped. Brighten after.

They are custom mixed and can come in any color you want.

they don’t seem to carry the colors we want.

they don’t seem to carry the colors we want.

They are not. Behr is poor in general and those types will not work for decks. You want a solid color deck stain. Try Flood brand or Cabot.

1. I live in Kentucky2. The deck is mostly in Full Sun. There are two levels, so part of the bottom level is in shade.3. I think it is pressure treate...

Thank you. Sorry for the late reply.

Try the TWP 1500 series.