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WD-40 is an effective way to remove glue and other sticky residue from many surfaces, including wood. Spray the WD-40 on the area, allow the product to sit for a few minutes, then carefully wipe away the residue. As with other adhesive removal methods, test the WD-40 on an inconspicuous spot first to ensure it won’t damage the finish. 

If you recently splashed paint on the wrong area of a wooden object, remove it with a solvent or caustic paint stripper. Some paint that has yet to dry may be removable by hand with coarse sandpaper or a plastic scraper. Another trick for removing dried-on paint is rubbing a dab of nail polish remover on the paint to remove it, but avoid touching the bare wood surface.

The best and fastest way to remove paint from a deck often involves combining a chemical stripper with a pressure washer. Gel-based paint strippers are highly recommended because their thick consistency makes them less messy and easier to apply than liquid strippers. After applying the stripper to loosen the paint, you can use a pressure washer to efficiently wash away the residue. When using a pressure washer for this task, it's important to use a low pressure (under 1000 PSI) to avoid forcing too much moisture into the wood, which could lead to mildew or rot.

Yes, you can paint over old exterior paint, but success depends on the condition of the existing paint and proper surface preparation. If the previous coating is in good shape (not cracked, peeling, or flaky), you can paint over it with less prep work. However, for the most durable and professional-looking results, follow these key preparation steps:

• Clean the Surface: Thoroughly clean the exterior to remove all dirt, grime, and mildew. A pressure washer can be very effective for this.

• Scrape and Sand: If the old paint is peeling, cracked, or flaky, you must scrape off all loose paint. After scraping, sand the surface to create a smooth, even base for the new paint. Sanding is especially important for wood siding.

• Apply Primer: Using a quality exterior primer is highly recommended. It ensures the new paint adheres properly, improves durability, and provides a uniform finish. If you are painting a lighter color over a dark one, a tinted primer will help cover the old color more effectively.

Some brands offer paint-and-primer-in-one products for convenience. Taking the time to prepare the surface properly will not only increase your home's curb appeal but also help protect your siding and extend its life.