New answers tagged staining
I hate to be critical of other contractors, but from the clues you have given in your question, I think I know what happened. First, pine is a much softer wood than oak and needs to be sanded very smooth before the first coat of urethane. The first coat raises the grain of the pine and almost always is somewhat rough regardless of how good the initial prep ...
One possibility is that he sanded the 2nd coat and then applied the third coat without adequately cleaning the sanding dust off. Another possibility is that he used too rough a sanding which would produced a lot of scratches in the coat.
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