Working with polyurethane is something that you will have to do at some point when finishing furniture or wood flooring. Applying it can be done by spraying or brushing it into place. Each method presents you with some unique benefits and drawbacks. Here are a few things to consider about each potential method of application.
Using a brush to apply the polyurethane finish to furniture or wood is the oldest method available. People have been doing this for many years. This method should be used if you are applying a small amount of polyurethane in a small area. It is the most accurate method as you can control exactly where the polyurethane goes.
Spraying polyurethane onto furniture or wood is another method that you could potentially use. With this method, you use a sprayer to apply the polyurethane onto the surface of the wood. The major advantage of this method is that it is quite a bit faster than brushing it on by hand. You can just aim the sprayer at the surface and spray it on in a manner of seconds. The drawback to this method is that it is not nearly as accurate as using a brush. You may spray polyurethane in places that you do not want to.
WARNING: Polyurethane can toxic to breathe in, especially if you've worked in a plant that manufactured it or have breathing issues or skin conditions. Read about the ingredients before using, and remember to wear protective clothing and a face mask while applying it.