covering knots in stained wood
Use B-I-N - it is a great shellac. Only apply this over the knots - not the whole surface - B-I-N is not designed to be a large surface primer.
Once the B-I-N has dried (give it a few hours)- apply your topcoat of stain - and you should be all set!
It seems that if I do the full cover stain....it won't fully cover...hence my dilemma - your opinions most welcome.
The one and only solution I've been happy with is to first cut out the knot and fill it with the exterior wood filler WoodEpox, manufactured by Abatron. It's expensive, but it's truly durable.