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Pressure washing is the best way to remove paint that’s already peeling from certain types of vinyl and aluminum siding and some masonry. However, if the paint is largely intact and not yet peeling, or if your siding material can’t withstand the pressure, you may need to use other methods, such as chemical paint strippers, a heat gun, a paint scraper, or sanding.

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.

Sometimes you can get away with simply sanding and painting over small areas of peeling paint. However, the problem will likely return quickly, and the ridge between old and new paint will be visible. If you just need a quick fix and won't worry about appearance, chip away the peeling paint as much as possible, prime and paint the area, and skip the spackle step.

Paint removal is a time-consuming job that can take anywhere from an hour for small surfaces, like a single stair banister, to multiple days for larger projects, like removing paint from wood siding. Expect to spend between five and 20 minutes per square foot. You can use chemical paint strippers to speed up the process, but be sure you use proper protective gear and take care to pick a product that’s suited for your material.