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Try using a small amount of Rubbing Alcohol. Brush or dab a small amount over the white marks, this may help release the moisture by softening the finish. Always do a test area first.
If the product has cured and will not release the moisture try acetone or nail polish remover in very small amounts to affected area only.
If these don't work get out the Furniture Stripper and start again.
Try and avoid polyurethane!
Try this product or something similar: Varathane Diamond Interior Finish, Water-Based
What else can I help you with?
Why is polyurethane separating from table after sanding off marine spar varnish?
Often, poly will not adhere due to contaminants on the surface. Remove all of the loose coating, sand the surface, brush off the surface with a brush, then remove the remainder the dust with a tack cloth.
How do you remove wet varnish from polyurethane?
Bleach
Remove the shine from Polyurethane?
To achieve a Matt finish on polyurethane you must sand it with a grade p400 average particle size in microns(in inches) .00137. this will defuse the light rather than reflect the light. you can always use a matting solution such as turps but it can get very messy and sticky if you don't know what you are doing.
How do you remove polyurethane from a stain door without removing the stain?
You don't. You will most likely have to restain after stripping.
How can you remove stains or blemishes from a polyurethane watch?
You can remove stains or blemishes from a polyurethane watch by scrubbing it with a wet terrycloth that has been dipped in a solution of warm water and liquid dish soap. For tough stains, dip a melamine foam sponge into the solution, ring out and wipe the watch gently. Dry well with a clean towel.
Can you put stain on top of polyurethane for a new finish?
No, you cannot put stain on top of polyurethane for a new finish. Stain needs to penetrate the wood, and polyurethane creates a barrier that prevents this. If you want to change the color, you will need to remove the polyurethane first.
Can you sand off polyurethane to refinish a piece of furniture?
Yes, you can sand off polyurethane to refinish a piece of furniture. Sanding helps remove the old finish and prepares the surface for a new coat of polyurethane or another finish.
What are some effective methods for fixing a blotchy polyurethane finish on wood furniture?
Some effective methods for fixing a blotchy polyurethane finish on wood furniture include sanding the surface to remove the existing finish, applying a wood conditioner to even out the absorption of the polyurethane, and then reapplying the polyurethane finish in thin, even coats to achieve a smooth and consistent appearance.
Can you sand polyurethane to achieve a smooth finish?
Yes, you can sand polyurethane to achieve a smooth finish. Sanding helps to remove imperfections and create a smooth surface for a professional-looking result.
How to use steel wool on polyurethane for a smooth finish?
To use steel wool on polyurethane for a smooth finish, lightly sand the surface with fine-grade steel wool in between coats of polyurethane. This will help remove any imperfections and create a smooth surface for a professional-looking finish. Be sure to clean the surface thoroughly after sanding to remove any residue before applying the next coat of polyurethane.
Can you buff polyurethane to achieve a smooth and glossy finish?
Yes, you can buff polyurethane to achieve a smooth and glossy finish by using fine-grit sandpaper or a polishing compound. Buffing helps to remove imperfections and enhance the shine of the polyurethane coating.
How can I refinish a polyurethane table top?
To refinish a polyurethane table top, start by sanding the surface to remove the existing finish. Clean the surface thoroughly and apply a new coat of polyurethane finish using a brush or roller. Allow the finish to dry completely before using the table.
How can I effectively remove scratches from polyurethane surfaces?
To effectively remove scratches from polyurethane surfaces, you can try using a fine-grit sandpaper to gently sand the scratched area. After sanding, apply a polyurethane finish to restore the surface's smooth appearance.
How can I achieve a shiny finish on polyurethane surfaces?
To achieve a shiny finish on polyurethane surfaces, you can follow these steps: Sand the surface with fine-grit sandpaper to smooth out any imperfections. Clean the surface to remove any dust or debris. Apply a coat of polyurethane using a high-quality brush or applicator. Allow the polyurethane to dry completely before sanding lightly with fine-grit sandpaper. Apply additional coats of polyurethane, sanding between each coat for a smooth finish. Finish with a final coat of polyurethane and allow it to dry completely for a shiny finish.
How can I effectively repair a polyurethane finish on my furniture?
To effectively repair a polyurethane finish on your furniture, you can start by lightly sanding the damaged area to remove any imperfections. Then, apply a new coat of polyurethane using a brush or spray, following the manufacturer's instructions. Allow the finish to dry completely before using the furniture again.
Do you typically sand stained wood before applying polyurethane for a smooth finish?
Yes, it is recommended to sand stained wood before applying polyurethane to achieve a smooth finish. Sanding helps to remove any imperfections and rough spots on the surface, allowing the polyurethane to adhere better and create a more even finish.
Do I need to sand stained wood before applying polyurethane for a smooth finish?
Yes, it is recommended to lightly sand stained wood before applying polyurethane to ensure a smooth finish. Sanding helps to remove any imperfections and rough spots on the surface, allowing the polyurethane to adhere better and create a more even finish.
