1.   A dark-colored semitransparent stain may cover them, but you may not want to use any stain, let alone a dark one.

2.   A large blood stain covered the wall and floor by the door, seemingly outlining the place where someone had sat down and died.

3.   Actually, you can try one coat of shellac on the knots and then semitransparent stain, and see how well the stain covers the shellac.

4.   If you do this, you will have to paint the threshold rather than stain it because the stain will not cover the filler.

5.   If the wood is weathered, the stain will cover fairly evenly.

6.   No primer is needed, and the stain will cover bare wood as well as old paint.

7.   The stain may not cover the shellacked areas as well as it does other areas, but it is worth taking that chance.

8.   Will a semitransparent stain cover the wood evenly?

9.   Outside, a bag of bloody bandages and medical supplies lay on the pavement and blood stains covered a bench where normally tourists would sit.