I used a brush to apply a thin layer of polyurethane over the entire floor, and then I used Lambskin to apply a layer of polyurethane to some recently stained floors. 95% of the floor looks great, but there are a few places where the polyurethane soaked in more than others due to the cracks in the old wood and a spot that had some problems and required more sanding between coats.

I am hoping to simply apply polyurethane in a few spots rather than put another layer on the entire floor. Can I just spot touch up the polyurethane, or is doing that going to make it look abnormal or not blend correctly.

Any experience with doing this?

Thanks in advance.