Spray polyurethane rather than brush for professional looking diy furniture november 28 2017 by scott saws on skates 15 comments spray polyurethane with a paint sprayer rather than applying with a paintbrush for a quick easy professional looking finish on diy furniture projects. Screw the cup onto the sprayer and plug it in.
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Atomizing water based coating doesnt atomize easily especially when the finish is cold.
How to spray polyurethane from a can. While a spray can may seem like an efficient and easy way to apply polyurethane to your woodworking project it can clog during use and prevent you from getting a clean smooth surface. Use the paper funnel to pour the polyurethane into the spray cup filling it about three quarters full. Spraying water based polyurethane be diligent before you even begin to spray you need to be diligent to avoid staining the surface.
If it is flat or semi gloss give it an extra stir to mix in the flattening ingredients. Once 24 hours have lapsed wipe off any dust and dirt and then spray on a second coat evenly too and let it dry fully for the same duration. Spray two extra coats of undiluted polyurethane.
Investing in an hvlp sprayer can produce a finish that is seamless and prevents spatters or runs. You can also purchase polyurethane in a spray can which makes it a bit easier to apply especially on large projects. The finish will build up in the center and be light on the edges with a product like polyurethane spray.
Better prep you should pay close attention to sanding the initial. Shake the can of polyurethane vigorously and open it. Once the coat forms on the surface let it dry for at least 24 hours before spraying the second layer.
If you have stains on the wood you should first use a mist coat rather than try to cover it up with a thicker layer of polyurethane. These two run the extremes of ease of use but produce excellent results. Wipe on polyurethane is used primarily by woodworkers who want to create a hand rubbed finish on special projects.
Using such a handle gives you better control over the spraying and saves your finger. Buy a spray handle from the store which allows you to use all your fingers. Thinning polyurethane for spraying many different solvents can be used to thin poly but the resulting slow drying overspray can turn into a serious problem.
Its natural to swing the spray polyurethane can in an arc but this results in uneven coverage.
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