what type of polyurethane to use on wood dresser
What Finish Is That Anyway?
You've discovered a swell piece of article of furniture, merely the once-shiny finish has seen better days. If you knew what the finish was, it would exist easier to remedy its condition. Now, you can find out.
You've discovered a great furniture, just the once-shiny end has seen improve days. If you knew what the finish was, it would be easier to remedy its condition. Now, y'all can find out.
The furniture piece could be relatively new or very old. Either mode, there's a skillful take chances you can repair the dull and dirty expect of superficial wear by renewing the existing finish. By doing that, you lot'll salvage yourself the time and problem of stripping, then refinishing. The trick is knowing what finish was put on in the starting time place. To identify the type of articulate moving picture stop on a piece of article of furniture, yous test information technology with solvents. (Run across the chart below.) To find out, only do the following.
Note: Furniture on which there are oil finishes repairs easily. Simply apply more oil finish after removing wax or furniture polish with mineral spirits or soap and water.
Outset with alcohol
Apply a few drops of denatured alcohol to the furniture, as shown in the photo above. Wait a few seconds; then touch the spot with a soft-bristle brush or a cloth. Shellac, a popular finish earlier about 1920, will soften and turn a bit sticky. If information technology doesn't, information technology's not shellac, then move on to the next test.
No luck? Try lacquer thinner
Change your solvent to lacquer thinner, and repeat the commencement step past applying a few drops of information technology to a new spot on the surface. If after a couple of seconds the finish softens plenty to virtually flow, yous have lacquer. (You lot already know it'due south non shellac.) Simply if the stop only becomes tacky, and you know that it was built in the concluding xx years or and then, the finish could be h2o-based. To exist certain, test farther.
Maybe yous need a stronger solvent
Endeavour touching a chip of xylene (available at hardware and paint stores) to a different part of the cease. If the examination expanse gets gummy, y'all're definitely looking at a h2o-based finish.
What to exercise when nothing works
If none of these solvents dissolves the quondam finish, it has to be 1 of the reactive finishes ane that cures through a chemical reaction such as varnish or polyurethane. You must thoroughly sand (scuff up) these film finishes before you tin apply some other coat of the same finish. Or, in cases of severe damage, yous have to strip them completely off with a paint-and-varnish remover, then sand and refinish.
Cease-restoration strategies
In one case you know what end y'all're facing, you can restore information technology in ane of several ways. Which one of the post-obit you lot choose depends on the result you lot want to achieve.
- For nicks, scratches, and small areas of damage, attempt reflowing the stop. A material dampened with denatured alcohol volition reflow shellac. You'll be able to dissolve the original finish and move it around to cover minor impairment, brightening the surface every bit yous go. This also works on lacquer finishes when you use lacquer thinner as the solvent. In either case, don't be over-zealous. Y'all could go completely through the cease.
- Cutting back the damaged surface picture to a more presentable layer. Do this with 0000 steel wool (or gray Scotch-Brite) or ane,000-grit or finer sandpaper, and lubricant (linseed oil) as shown below. It'southward much like sanding between coats when y'all want to build upwardly a finish. The trouble with this method: Y'all don't really know how thick the finish layer is, and then yous could cut through it to blank wood. If your pick to cutting back the finish is refinishing, you might as well try it.
If the original terminate is thick enough, you can repair superficial damage by rubbing it downwards.
- Apply more of the finish blazon atop the onetime.Classify this as a thorough finish repair; and the well-nigh fourth dimension-consuming of all. You want a clean, dull finish, so first remove any polish or wax with mineral spirits or lather and water. Then, proceed as if you were adding a second coat of a new stop.
Sand the existing finish with extra-fine sandpaper (400-grit or greater) or 0000 steel wool (unless you're putting on a water-based terminate, and so apply gray Scotch-Brite rather than steel wool then yous won't end upward with tiny rust spots). Then, remove all grit with a tack cloth and apply another coat of finish, as shown below. It'south non necessary that you match the commercial make of original finish, just the blazon: shellac, lacquer, water-based, etc.
Once yous know what type of finish is on a piece, you tin recoat it with the same blazon.
Source: https://www.woodmagazine.com/materials-guide/finishes/what-finish-is-that-anyway
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