4 steps to a perfect polyurethane finish
Prepare your workpiece
A glass-smooth finish begins with a level, even surface. To achieve this on open-grain woods (oak, ash, walnut, or mahogany, for instance), first fill the pores with a wood-grain filler, photo right.
Quick Tip! Wood-grain fillers come in different colors; you can choose one to blend with the color of the workpiece for an even appearance, or select one that contrasts for more pronounced grain.
Scrape off the excess and let dry. Sand the workpiece to 220 grit.
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