Why is my spray paint bubbling? Troubleshooting your bubbling spray paint problem: a step-by-step guide

why is my spray paint cracking Paint FAQs

You’re probably wondering why is my spray paint bubbling up. This can be a frustrating and confusing problem, but don’t worry – we’re here to help.

In this guide, we’ll explain the causes of bubbling paint and show you how to fix it. So read on and get started!

why is my spray paint bubbling

When spray paint bubbles?

Spray paint should be well applied to the surface and be clean without any small bumps. A hurried job or an improperly cleaned surface might also create spray paint bubbles.

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Why is my spray paint rippling?

The painted surface was dirty.

Have you ever wondered why the first step of spray-painting is cleaning walls?

Improper cleaning causes particles of dirt and dust to inevitably sit on the walls, making it hard for the first coat to stick to the wall properly, so air bubbles appear.

Solution: To prevent air bubbles, thoroughly clean the surface with a wet sponge and, afterward, with a dry cloth. Let the surface fully dry before applying the plaster and a fresh coat of spray paint.

High humidity outside or excessive moisture.

Excessive moisture, such as water drops, high humidity, or water leaks, may cause bubbles in your painting. Such bubbles are more common in bathrooms, kitchens, or basements without proper ventilation.

Solution: The first step is to check and fix the source of moisture. After that, clean and dry the walls. Check the relative humidity (ideally between forty and eighty percent) before applying a fresh layer.

If the reason lies in the room, we suggest you do not use anything that can cause a rise in the humidity, like using the shower in a freshly painted bathroom.

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It’s too cold or too hot outside.

Extreme heat is a common problem in rooms with heating devices or large exposures to a direct sunlight. Applying paint in such conditions leads to uneven drying of layers, which leads to annoying bubbles in the paint coat.

Solution: The ideal outside temperature is between fifty degrees and ninety degrees Fahrenheit. To remove air bubbles, use a scraper to remove damages, then clean and apply the base coat.

Paint in a well-ventilated (but not windy) area, and keep painted objects out of direct light until they are completely dry.

Poorly primed or skipped primer application.

Priming is an important step before painting that should not be skipped. Materials such as drywall are prone to absorbing more paint than primed surfaces.

Priming creates a base coat on which paint can stick better. Without paint, there are high chances of your painting coat becoming bubbly.

Solution: If you have noticed that applying paint without primer, follow these steps:

  • Remove the bubbles using a scraper.
  • Clear the surface of the dust and dirt.
  • Apply primer before repainting.

Remember that the primer must be completely dry before applying paint. Otherwise, the paint thinner component will be trapped in wet primer, creating more air bubbles.

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The paint didn’t dry properly.

If the layer of paint was too thick or two coats were applied in a short time, the likelihood that bubbles would form in the paint would increase.

Solution: Clean the loose paint with a putty knife or metal brush and sand it with sandpaper. If necessary, start putting. The surface should be primed before painting. When painting a wooden surface, first prime it with acrylic putty.

When repairing a wall or ceiling, putty it first, then primer. Instead of applying a thick coat, which requires a longer dry time, paint two thin coats.

How do you fix spray paint bubbly?

Alright, we’ve covered all the main mistakes and factors that may make your spray paint bubbly! And now moving on, tricks and tips on how to fix bubbly spray paint.

Here are steps on how to make your spray paint flawlessly smooth:

  1. Clean and dry the affected area

Spray-painting on a dry and dirty surface prevents paint from properly bonding to the underlying coat or primer.

  1. Avoid hot days

The heated environment leads to quick drying of the outer layer, while the layers underneath stay wet. Bubbles will form on the surface.

  1. Remember to use a primer

Primer provides an adhesive layer for better bonding to a paint cover. Remember to let the primer dry completely.

  1. Consider what type of paint you are using

Quality is crucial! The better spray paints are, the better they will adhere, thus perform on the surface.

  1. Paint in uniform thin layers

A thick layer has a longer drying time, so paint cover may become inconsistent. Moreover, if you paint over the wet layer, it will increase the chances of getting bubbles. It’s better to have many thin layers than one or two really heavy and improperly applied layers.

  1. Allow the spray paint to fully dry

Whether it’s a primer coat or a color coat, wait at least twenty-four hours between coats. This step will prevent you from thinking, “Why my spray paint bubble?”

  1. Use sandpaper

If bubbles have started to appear, simple sanding may help. 220 grit is a good option to use. Remember to clean the area before reapplying.

Removing all the paint is also an option, but a time-consuming one that requires a lot of time and work.

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Read also: How long does primer take to dry on surfaces before painting?

Can bubbled paint be fixed? Causes and solutions for spray paint bubbling on metal

Why is my spray paint bubbling on the metal surface?

Spray-painting on metal gives a nice, smooth finish, but what to do if the results are unpleasing? The common causes of bubbling on metal are-

  • Metal wasn’t prepared.

Properly clean the entire surface to get rid of any dirt, dust, or any other contaminants.

  • The surface was too warm or too cold.

If you are working with metal, you have to remember that it keeps the temperature longer, so consider working in warmer sunlight or colder space.

  • Primer layer wasn’t fully dried.
  • Following layers were too heavy.

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How to fix spray paint bubbles on metal surfaces?

Before starting to fix bubbles on metal, you need to decide what reason caused your problem. Typically, the issue stems from how the base or top coat was applied. Different causes require different methods. Follow these steps!

  1. Let the paint dry completely

If you see air bubbles appearing on spray paint, do not rush to remove them. Sometimes, after drying, immediate paint bubbles disappear on their own.

  1. Scrape the damaged area

Before removing the bubble area, you must observe how many bubbles you have. A few bubbles are totally normal, but if the number is higher than five, there is a reason for concern. Grab a putty knife and give continuous vertical and horizontal strokes and pull it out!

  1. Sand the metal surface

Fill holes with patching compound after removing the paint layer and allow to dry. If the mixture dries normally, take sandpaper to sand the patched areas.

  1. Prepare the surface

Remove any dirt, dust, or other contaminants. Let it dry properly and apply the primer.

  1. Repaint the painting process

After drying the primer, carefully and slowly apply the second coat.

Spray paint bubbling on wood: causes and solutions. Why is my spray paint bubbling on the wood?

One of the most common problems causing paint bubble on the wood is moisture or heat. For your blistering or bubbles on wood, consider related reasons:

  • The painted surface was dirty.
  • High humidity or heat (temperatures above 85°).
  • Applying oil-based paint over a latex base.
  • Leaks or improper construction that allows to trap moisture between two layers.

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How to fix spray paint bubbles on wood

Use our step-by-step guide below to fix paint bubbles and blistering on the wood.

  1. Prepare the necessary tool

To start fixing air bubbles on the wood, you’ll need:

  • Brush
  • Deck stripper
  • Sandpaper
  • Primer
  1. Brush out the bubbles in spray paint

If you notice bubbles right after applying the coat, prepare to brush them out.

Gently brush over the bubbles and whoosh! They’re all gone!

  1. Strip the wood surface.

If you noticed blistering after the paint layer was completely dry. Just strip the wood! Take a deck stripper and carefully wipe off as much as you can.

  1. Use sandpaper to remove blotches.

After sanding, the surface is thoroughly wiped down and dried. Repaint the damaged part, and you’re done!

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Why is my spray paint bubbling on my latex surface?

Latex paint is a water-based paint. You should follow the instructions to apply spray paint properly. If the steps aren’t done properly, an air bubble will occur.

What is the main cause of spray paint bubbling on a latex surface?

  • Using tap water instead of distilled water.
  • The painted surface was dirty.
  • Improper cleaning of spatter and drips.
  • Using a low-quality spray gun or spray paints.
  • The fluid nozzle of the spray guns was small.
  • The air temperature or the substrate is too cold. In these cases, the surface skins over with little or no set in the body of the paint film.

Why is my second coat of spray paint bubbling?

Usually, paint problems are caused by the way the base coat was applied or dried. The second coat should remain uniform, unless there is an excess of thick coating.

The paint shrinks and blisters when exposed to direct sunlight or high humidity.

This is why spray paint bubbling is seen in multiple thin coats.

Here are some extra tips on how to apply the paint correctly:

  • Shake the paint before using fresh paint for about three minutes.
  • When spraying, keep your application stroke fluid and light. Overlap your spray paint pattern by about one-third.
  • To avoid paint bubbling, make sure to apply a second coat of paint after the first layer has dried.

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Spray paint bubbles can be frustrating, but they don’t have to ruin your painting project. When you use our advice, you’ll easily fix the problem with the paint job.

Now that you know how to eliminate bubbles from paint, get out there and get started on your painting project!

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My blog was created specifically to bring you the latest design trends. I graduated from Parsons School of Design in New York 10 years ago. I started drawing as a child. I was very fond of design and could even choose a style for my friends and relatives during the renovation.

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