The most common reason is an incompatible stain. When the top coat is applied, the oil in the stain seeps up through the finish and reacts with the acrylic causing a chemical blush.
Mayonnaise. "Mayonnaise works well to treat heat stains, or white stains on wood from fluid," says Poepping. Dip a microfiber cloth in a bit of mayonnaise. Dab the mayonnaise onto the stain, continuously wiping the spot clean as you work.
All stains and finishes depend on evaporation to dry, but when the temperature is below 65 degrees or above 90 degrees, or the humidity level is above 50%, then the evaporation process is either too slow or too fast, causing your finish to either not dry or dry too quickly, turning white — like my deck!
A Better Way to Tell
To tell if it is still good, start with a visual inspection. Discard finishes that have become thick, rubbery, stringy or separated, as well as those with a skunky odor or obvious mold growth. Ditto for water-based paint or finish that looks like cottage cheese.
Before I get ahead of myself… hazy white stains are caused by moisture trapped between the finish on your table, and the wood itself. They are caused by water or condensation sitting directly on the wood.
To fix this, the surface needs to be scuffed and sanded first. Second, we recommend applying a sanding sealer to protect the top. Sanding sealer has a larger resin particle, so it will provide a better build for the next sanding step. Then finish with your topcoat.
Cover the entire stain with a thin layer of baking soda and rub it in with a dry cloth. Then, dip a soft-bristled toothbrush in white vinegar and gently scrub the baking soda. When the mixture stops bubbling, wipe it off with a dry cloth. You can do this as many times as you need to completely remove the stains.
This is totally normal and only cosmetic, it doesn't affect how long a stain or sealer will last and doesn't do any damage to the wood itself. Of course this doesn't always happen and there are ways to prevent this from happening as well as fix it if the cosmetic appearance of the “Fuzzies” bothers you.
Often when people restain timber, the old Stain is either sanded away, is already flaking off, or can be restained over. While you can restain a deck over an existing stain without sanding or removing the existing peeling product, this isn't always recommended and can leave your deck looking a little worse for wear.
The longer the stain is left on, the deeper and richer the color will be. For consistent color, use careful timing. Never allow any stain to dry on the wood surface—it will prevent the clear finish from adhering and cause other issues.
When water penetrates the wood, it can cause the fibres to swell and then contract as they dry, leading to a faded or whitened appearance. Prolonged exposure to moisture can also lead to mildew or mould growth, which can further discolour the wood.
“When water stains on the finish of wood furniture show up as those white cloudy rings or marks, this coloring is a sign that the moisture is in the finish and hasn't yet reached the wood,” DeWitt says.
Water Whitening is a phenomenon that occurs when moisture or water comes into contact with a water-based decking oil that has not fully cured. Usually this happens when it rains shortly after finishing the deck, however a particularly dewy evening can cause whitening on the decking surface.
With oil or solvent-based film-finishes, application during very high relative humidity conditions can cause water vapor to condense on or under the finish as it is applied or dries. The water is then absorbed into the finish and forms a cloudy appearance.
Use an ammonia solution: An ammonia solution of about 2.5 dl (1 cup) of ammonia per 4 litres (1 gallon) of water can be used to dissolve the build-up that's causing the haziness of your floors. Remember to use this solution carefully, so that you don't further damage the floor with excess water.
Combine Vinegar and Olive Oil for a DIY Wood-Stain Remover
Vinegar and olive oil can act as a powerful duo against stubborn water stains. The vinegar will help remove the stain, while the olive oil acts as a furniture polish.
You can also leave the wet stain on the wood for longer before you wipe away the excess - sometimes as long as 15 minutes. This may help you achieve a deeper color. Note: check the label directions for the particular stain you're using to see the maximum time you can wait before wiping off the excess stain.
Avoid Over Application
People are often mistaken in thinking that applying more coats will make the stain more durable, and therefore last longer. However, oversaturation will create a thick film on the surface that will flake and peel off in a matter of weeks.
In some cases, you can get away with leaving the previous coat as it is, as long as you perform the other necessary preparation steps, such as sanding and power washing. If, for instance, the new stain is the same brand and color as the old stain, you might not need to go through the complete removal process.
As the wood surface is exposed to heat and drying (as from direct sunlight), the water evaporates and salt crystals form in the wood cells (Fig. 2). Over time, the physical forces exerted by the salt crystals push the fibers of the wood apart, causing the “fuzzy” appearance (Fig.
If you used a penetrating oil stain, you may have allowed the stain to build up too thick a coat on the surface of the wood. Penetrating wood stains are not intended to be a surface finish. If applied too thickly, they won't dry properly and will remain tacky to the touch.
The good news is that the fix is fast and easy. To remove the fuzzies, give the deck a quick sanding. That's it. All those fuzzy fibres will simply pop off easily after one quick pass of the sander.
They're sneaky, and while they may look colorless while still wet, as soon as they're dried, they'll leave a yellow-ish color on your baby's clothes, and an off-putting smell of, well, old milk!
Buff the surface lightly and evenly with No. 0000 steel wool dipped in linseed oil. Work with the grain of the wood, rubbing evenly on the entire surface, until the white haze disappears. Then wipe the wood clean with a soft cloth, apply two coats of hard furniture wax, and buff the surface to a shine.