- 1). Choose a fast-drying option, such as the Minwax Fast-Drying Polyurethane. In colder temperatures, polyurethane tends to dry more slowly, which can cause a whitish film to develop.
- 2). Take the item you're finishing into a warmer area to apply the polyurethane, which you can do with movable items such as outdoor furniture. Minwax recommends temperatures above 50 degrees.
- 3). Warm up the temperature where you're applying the polyurethane if you cannot move the item you're finishing. For example, a space heater can help temporarily heat up a garage or other cold area.
- 4). Apply a second coat of polyurethane if the finish has developed the whitish color that can result with cold-weather applications. According to Minwax, this can help diminish the undesired effect.
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