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How Do You Know If Your Painter Did Enough Prep Work?

September 3rd, 2025

5 min read

By Kaylea Kuhlman

Exterior of house with primer and caulk on it before it gets painted in Omaha, NE.

When it comes to painting your home, whether it’s a fresh coat for your living room walls, a new stain for your deck, or a cabinet makeover, the prep work is essential. Many homeowners don’t realize that the quality of prep work can make or break the final result. But how can you tell if your painter did enough prep work before starting the job? In this article, we’ll dive into what prep work really involves, why it’s so important, and how you can ensure your painter has done their due diligence.

At Brush & Roll Painting, we’ve been serving Omaha homeowners since 1996, providing professional interior and exterior painting services, including cabinet painting, with a focus on high-quality products and thorough preparation. Over the years, we’ve learned that the key to a successful paint job lies in the details, especially when it comes to prep work.

Prep work involves more than just cleaning surfaces; it’s about setting the foundation for your paint to last, look great, and provide durability. Whether you're painting your living room, exterior surfaces, or even your kitchen cabinets, understanding the steps your painter should take to properly prep surfaces will help you ensure you're getting the quality you deserve.

In this article, we’ll guide you through the necessary steps of prep work and show you how to evaluate whether your painter did enough. You’ll learn what signs to look for and how to tell if your painter took the time to do things properly. By the end of this article, you’ll have a solid understanding of how to check if your paint job is built to last, whether it’s interior painting, exterior painting, or cabinet refinishing. 

What is Proper Prep Work in Painting?

Before any paint touches the surface, several prep steps should be taken. Whether the job is interior, exterior, or cabinet painting, these steps are crucial for ensuring the paint adheres well and lasts. Here’s a breakdown of what your painter should be doing:

1. Surface Cleaning and Repair

For Interior Painting (including Cabinets):
The first step is to clean the surfaces to remove dust, dirt, and grease. These contaminants can prevent the paint from sticking properly. A good painter will wipe down walls, baseboards, trim, and cabinets to ensure there’s no residue left behind.

For Exterior Painting:
Cleaning is even more important outdoors. Dirt, mildew, and mold can all affect paint adhesion. If you’re having your exterior painted, your painter should be power washing surfaces to remove any buildup of grime or organic growth. Skipping this step can lead to peeling or flaking paint down the road.

After cleaning, any surface imperfections like holes, cracks, or dents should be repaired. A reliable painter will fill in holes, smooth rough spots, and sand down any uneven areas. This step ensures the surface is smooth and ready for paint.

Brush & Roll Painting painter sanding a wood playground set before restaining it.

2. Proper Sanding

Once the surface is clean and repaired, sanding is next. Sanding helps to create a smooth surface for the paint to adhere to. For wood surfaces, including cabinets, this is particularly important, as it helps to open the pores of the wood, allowing the paint to bond better. On drywall, sanding helps to remove rough patches and blend in any filler used in repairs.

The level of sanding depends on the type of surface and the type of paint being used. For example, if your painter is using a high-gloss finish on your cabinets, a finer sanding will be necessary to create the smoothest possible surface. Be sure to ask your painter what kind of sanding they'll be doing, as skipping this step can result in a lumpy or uneven finish.

3. Priming

Priming is another key step in the prep process, especially for areas that are being repainted or for surfaces that may have stains or high moisture exposure. Priming helps to create a uniform surface and ensures that the paint adheres well.

For interior walls, a good primer will seal in any stains, preventing them from bleeding through the topcoat. For exteriors, primer acts as a protective layer, especially on porous surfaces like wood or masonry, ensuring that moisture doesn’t seep into the paint and cause it to peel or blister.

When it comes to cabinet painting, priming is especially important to ensure the durability of the new finish. A high-quality primer helps seal the wood, reducing the risk of paint chipping or fading over time.

4. Masking and Taping

Any professional painter will take the time to mask off areas that shouldn't be painted, such as windows, door hardware, and trim. This helps to create clean lines and prevents accidental splashes. Taping also ensures that you don’t end up with paint on places you don’t want, like your ceiling or the floor.

When checking if your painter has done a good job here, look for straight, sharp lines where different surfaces meet. This is a clear indication that proper prep was done to protect other areas from paint splatter.

5. Caulking and Sealing Gaps

For both interior and exterior painting, caulking and sealing cracks and gaps are important for both appearance and function. Exterior painters will often seal gaps around windows and doors to prevent moisture from getting into your home, while interior painters may seal gaps around trim and baseboards to ensure a tight, polished look.

For cabinet painting, caulking is often used to fill gaps between the cabinet doors and the frame or around the edges of shelves. If you notice gaps or cracks around the edges of your paint job, this may be a sign that the painter skipped this important step.

Painter caulking gap between window trim and wall inside of a room in Omaha.

How to Tell if the Prep Work Was Done Right

So, how do you know if your painter has done enough prep work? Here are a few things to look out for:

Look for Smooth Surfaces

Once the paint has dried, check the surfaces for smoothness. Are there any bumps, lumps, or ridges in the paint? These could be signs that the surface wasn’t properly sanded or that filler wasn’t applied evenly.

Check for Proper Adhesion

If the paint is peeling or chipping off easily, it's likely that the surface wasn’t prepared correctly. Proper prep work ensures that the paint bonds firmly to the surface. If the paint is coming off, there may have been an issue with cleaning, sanding, or priming.

Inspect the Edges

Take a close look at the edges where the paint meets trim, windows, or other surfaces. A clean, crisp line is a good sign that your painter spent time taping and masking properly. If the lines are messy or uneven, this could indicate a rushed job.

Notice any Stains or Discoloration

If you notice stains or discoloration coming through your paint job after a few weeks, it could mean the painter didn’t apply primer or used the wrong type. Good prep includes priming any stained surfaces to ensure the paint job is uniform.

Power washer spraying the exterior siding of a house before painting.

Why Prep Work Matters for Your Paint Job

When it comes to painting your home, whether it’s interior, exterior, or cabinet painting, prep work is the foundation for a successful job. Whether it’s ensuring that your paint lasts or providing a smooth, clean, even finish, it’s the prep work that makes all the difference. By now, you should know what proper prep work involves and how to assess whether your painter has done enough. Keep an eye on the steps we’ve outlined, and don’t hesitate to ask questions about the prep process.

If you want to make sure your paint job is done right, reach out to Brush & Roll Painting for a professional evaluation. Our team of experts has been serving Omaha homeowners since 1996, and we know what it takes to deliver long-lasting, beautiful results.

Click the button below to get a quote and ensure your painting project is set up for success. 

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Kaylea Kuhlman

Kaylea is the Brush & Roll Painting Content Manager. Kaylea is a Journalism and Media Communications summa cum laude graduate with a minor in Marketing from the University of Nebraska at Omaha. Kaylea manages the marketing for Brush & Roll Painting.