Step-by-Step Instructions and Pictures of How To Apply a Polyurethane Finish

By David Radtke
How to brush on a perfectly smooth varnish finish. Read an overview on how to apply a polyurethane finish.
How To Apply a Polyurethane Finish-Step 1
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1. Make your own sealer by thinning oil-based polyurethane with mineral spirits. Brush the sealer on with a natural-bristle brush using long, even strokes. Be sure to catch any runs.
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