I'm finishing a custom mahogany wood sill for an interior wall opening and have stained and finished it-- lightly sanding with 220 between four polyurethane coats.
In the first two coats a couple bubbles and particles dried into the finish, but light sanding managed those. The third coat had two small imperfections which I lightly sanded down leaving a whitish haze that should have disappeared in the next coat. However, they didn't. They are not major imperfections and only can be seen when light reflects in just the right way, but I would like input on the best fix for these areas.
Will more poly coats work or do I have to get down to the sanded level and fix it there?