Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. This defect is caused by silicone in the substrate which may have been left by furniture polish or wax. Portable Burn Barrels Safely and thoroughly incinerate yard and non-hazardous household waste & documents, Easy DIY Upgrade for the Modern Bathroom GROHE, the leading global brand for bath and kitchen water solutions, introduces the GROHE Rainshower 310 SmartConnectTM shower head with wireless remote control. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. As a clear finish for woodwork, polyurethane has advantages over lacquer and alkyd varnish, but it also has disadvantages.
So, the spots are too noticeable for this type of project. Anything you might put on the existing finish to dull it would damage the finish. My thanks to all of you for your feedback (p.s. The only other option would be to rub the finish which will make the appearance cloudy. Wax buildup: Floors that have a polyurethane finish do not need to be waxed. I could do some tests with mild acids, such as vinegar or diluted Muriatic acid... but I fear that IF they flattened the sheen, they might likewise cause it to frost (get a milky non-transparent quality).
The more flattening agent it has determines the difference from semi-gloss to satin to flat.
Many can be corrected by sanding and recoating. You will have to go to a regular paint store for a flat poly. Can you post a picture of what you are working on...sounds interesting. It would be better to use a prepackaged flat poly but if that isn't a option a paint store can sell you the flattening agent to add to satin poly to flatten it more. A.
I didn't suggest a product because I didn't know if you used oil or WB poly. Lightly sand the work surface to dull the existing finish and promote better adhesion of the following coat. After it dried, some areas were glossy while other areas were nearly matte flat. They are both way too abrasive, and dull the finish … and produce a shine. I agree with Rick’s suggestion to apply a flat poly to solve your problem. A. The box stores are only going to sell the most common products. © Copyright 2020 Hearst Communications, Inc. It is also possible even a paint store won't stock the flat poly but will order it for you. All polyurethane … On the plus side, it is an extremely hard plastic that protects well and is relatively easy to apply. http://www.harmonyadditive.com/additive.html, http://www.woodworkingtalk.com/gallery/showgallery.php?cat=500&ppuser=1269, Modern Masters makes a WB dead flat polyurethane, Epifanes makes an oil based matte varnish, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. What caused this to happen, and can I repair it? Step-by-Step Outdoor Spiral Staircase Construction, How To Cut And Install Crown Molding And Trim, Install Plywood Underlayment for Vinyl Flooring. (Information courtesy of Sherwin-Williams). They can be caused by the turbulence of the paintbrush or by moisture released by the substrate. JavaScript is disabled. A forum community dedicated to professional woodworkers and enthusiasts. Applying polyurethane in even coats is a crucial, though not always simple task. For this reason, it is important to stir the product frequently as you work to ensure greater uniformity of sheen.