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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.

Lead removal is crucial in older homes to eliminate risks of lead poisoning, which can severely affect health, particularly in children, by impacting development and cognitive functions.

The best way to remove lead paint is by wet hand sanding and removing all dust and residue with a HEPA vacuum. Professionals may also strip and scrape lead-based paint with a paint scraper. In some cases, you may choose to have a pro encapsulate or enclose your lead-based paint surface by covering it with a sealant or a new material. You may also choose to replace the material altogether.

It’s best to use a slightly slower-working paint remover that is safer to use, such as mineral spirits, because the strongest spray paint removers are often also the most toxic. Many of these products contain dangerous chemicals, such as methylene chloride, which the EPA banned for most uses in April 2024 after it was established as a major carcinogen.