Omar Khalid
Painting plastic to resemble rusted metal can be a fun and inexpensive DIY project. This technique can be used to create a steampunk or industrial aesthetic for your walls, ceiling, or floor. It can also be used for props, such as in cosplay or film. To achieve this look, you can use a combination of primers, paints, and weathering techniques. The process typically involves applying a primer, such as a gray automobile primer, to the plastic surface. Once dry, a thin coat of chalkboard paint is applied and wiped off, creating a matte finish. The dry-brushing technique is then employed, using silver or metallic acrylic paint to give the surface a subtle sheen or a rusty appearance. For a more textured look, coffee grounds, cinnamon, or sawdust mixed with glue can be added to create rust spots. Finally, sealing the paint work with a product like Testors' Dullcote can protect the finish and make it more resistant to damage.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Paint | Burnt Sienna, Burnt Umber, Silver Acrylic, Red Oxide Acrylic, Chalkboard, Primer, Rustoleum Dark Steel, Acrylic Blackwash, Translucent Paint, Graphite, Duralumen, Gun Metal, Gloss Black, Alclad Chrome, Wax with Metallic Powder, Reactive Metal Paint, Rust-Oleum Chalkboard Brush-On |
| Supplies | Isopropyl Alcohol, Paper Towels, Brushes, Dish Soap, Sawdust, Wood Shavings, Glue, Coffee Grounds, Cinnamon, Masking Fluid, Rubber Cement, Petroleum Jelly, Mustard |
| Techniques | Dry-Brush, Wash, Sanding, Pre-Shading, Weathering, Blackwash |
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What You'll Learn
Use a primer
To paint plastic so it looks like rusted metal, using a primer is an important step. Primer is a preparatory coating put on materials before painting. It blocks stains from bleeding through the paint and helps paint adhere better to the element being painted. It also improves paint durability and provides additional protection for the plastic.
When painting plastic to look like rusted metal, it is recommended to use gray automobile primer as it sticks well to plastic and gives a great matte gray finish. You can pick up a can of this primer at most home improvement stores for just a few dollars. Once the primer is dry, you can move on to the next step.
It is important to note that the primer should be sanded repeatedly until the plastic surface begins to look like metal. Sanding the primer will help create a smooth surface for the paint to adhere to and will also help to remove any imperfections in the plastic surface.
If you want to create a more realistic effect, you can use a technique called "the wash". This involves using black paint diluted with water in a 1:4 ratio to help make the steps between the layers more deep and pronounced. You can also use other materials such as rubber cement, petroleum jelly, or mustard to create a masking effect and reveal artificial chips in the paint.
Additionally, if you want to add some shine to your project, you can use silver acrylic paint with a dry-brush technique. This will give a subtle hint of metallic nature to your project.
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Apply chalkboard paint
To paint plastic so that it looks like rusted metal, you can use chalkboard paint as part of a multi-step process. Here is a detailed guide on how to apply chalkboard paint:
Firstly, you will need to ensure that the surface is smooth and free of any holes or rough spots. Use fine-grit sandpaper to even out any imperfections. If there are any nail holes, fill them with spackle, and then sand the area again to ensure it is level with the surface. It is important to note that chalkboard paint is not as thick as regular paint, so it will not fill in any holes or divots.
Next, protect the surrounding area with drop cloths to prevent any accidental messes. Use a tack cloth to wipe away any remaining dust or debris from the surface.
You can then prime the surface if you wish, although this is not mandatory. Primer can improve adhesion and is especially recommended if the surface is rough or porous. A gray automobile primer works well on plastic and gives a nice matte finish. Allow the primer to dry before proceeding to the next step.
Now it's time to apply the chalkboard paint. Use a foam brush to rub a thin coat of chalkboard paint onto the surface. Immediately wipe off the excess paint with a rag. You will likely need at least two coats of paint, and possibly three, depending on the surface and the brand of chalkboard paint you are using.
Allow the paint to dry and cure for 72 hours before conditioning it. To condition the chalkboard, simply rub the side of a piece of chalk over the entire area, and then use a dry cloth to rub the chalk into the surface. This creates a fine layer of dust that ensures the chalk will rest entirely on the surface and can be easily erased.
And that's it! You now have a chalkboard surface that looks like vintage metal. You can use this technique to paint plastic bins, buckets, or planters to achieve a unique, inexpensive, and attractive finish.
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Dry brush silver paint
Painting plastic to look like rusted metal is a simple and inexpensive solution to transform ordinary plastic bins or shelves into vintage metal. To achieve this look, you can use the dry-brushing technique with silver paint. Here is a step-by-step guide to help you master this technique:
Step 1: Prepare the Surface
Start by choosing the right plastic surface you want to paint. It can be a plastic bin, bucket, or even wood panels and shelves. If you're working with a shiny plastic surface, it's recommended to sand it lightly to create a rough texture, which will help the paint adhere better.
Step 2: Prime the Surface
Apply a primer to the plastic surface. A gray automobile primer is a good option as it adheres well to plastic and provides a nice matte finish. You can find it at most home improvement stores. Once the primer is dry, you're ready for the next step.
Step 3: Apply a Base Coat
Use a foam brush to apply a thin coat of chalkboard paint or any desired base colour. Immediately wipe off the excess paint with a rag, leaving a thin, even coat. This step ensures that the silver dry-brushing will have a suitable surface to adhere to.
Step 4: Dry Brush with Silver Paint
Now, it's time for the crucial step of dry-brushing with silver paint. Choose a light, shiny silver paint with an emulsion consistency, such as Citadel's 'Mithril Silver' or Testor's Matte Aluminum. You can also use acrylic silver paint, which will give a subtle metallic hint.
Dip your brush into the paint, and then wipe off the excess on a non-porous surface, like a small piece of wood or a plastic palette. You want the brush to be mostly dry, with just a hint of paint remaining.
Lightly brush the silver paint onto the hard edges and details of your plastic surface. This technique will create a worn, metallic look, as if the paint has scraped away to reveal the metal underneath. You can add vertical streaks or smudges to enhance the effect.
Step 5: Create Rust Effects (Optional)
If you want to add more depth and create a rusty appearance, you can use techniques like "the wash" or add textures using sawdust, coffee grounds, or cinnamon. You can also dry-brush with rust colours like burnt sienna, burnt umber, or red oxide acrylic paint.
Step 6: Seal and Protect (Optional)
Finally, you can seal your work with a product like Testors' Dullcote to make the effect more resistant to damage. This step is especially important if your painted item will be exposed to the elements or heavy use.
With these steps, you can transform ordinary plastic items into convincing rusted metal surfaces. So, get your brushes ready and let your creativity flow!
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Create a rust texture
To create a rust texture, you can use a variety of methods and materials, depending on the desired level of coarseness and the object being painted. Here is a step-by-step guide:
Prepare the Surface:
Start by deciding whether you want the entire object to appear as bare metal or just have exposed metal in a few places. If you opt for the latter, use the dry-brush technique with a flat brush and metallic paint to create distinct oval or circular shapes, focusing on areas that would typically see wear and tear, such as edges and prominent features.
Create Rust Texture:
To add a 3D rust texture, you can use a variety of materials such as sawdust, wood shavings, coffee grounds, or cinnamon. Mix these materials with a small amount of glue to create a coarse paste. Dab this mixture onto the areas where you want rust spots to appear, allowing it to dry completely before adding more layers to achieve the desired buildup.
Alternatively, if you're looking for a quicker solution, simply dab glue onto the desired areas and sprinkle coffee grounds or cinnamon onto the glue spots. Tap off the excess and repeat as needed to build up the rust texture.
Paint the Rust Texture:
Once your textured spots are dry, it's time to paint over them to create the illusion of rust. You can use a variety of paint colours for this, such as Red Oxide acrylic paint, Burnt Sienna, or Burnt Umber. Apply the paint using the dry-brush, pit, and smudge techniques, blending the colours together sparingly over the black and brown layers.
Seal and Protect:
Finally, to protect your work and enhance its durability, consider sealing it with a product like Testors' Dullcote or a similar sealant. This will help make your rust effect more resistant to damage and give it a more matte appearance.
With these techniques, you can create a realistic and textured rust effect on plastic, giving it the appearance of aged and distressed metal.
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Seal with Dullcote
To paint plastic so it looks like rusted metal, you can use Testors' Dullcote to seal the paint job and protect it from damage. Dullcote is a matte sealer that limits light reflections, giving your project a more authentic, worn-out look. It is available as a spray sealer, which can be found in many chain art stores in the US, such as AC Moore, Michaels, and JOANN Fabrics, as well as in hobby stores that carry model cars and trains.
Dullcote is also available in the UK, although it may be harder to find and is often out of stock. If you are based in the UK, you may want to try alternative methods of application, such as brush-on or airbrush. The latter is recommended for larger projects, as it is easier and provides a smoother finish.
Dullcote is a popular choice for modellers and is highly regarded, with some users reporting that it takes multiple attempts to cover gloss finishes. It is important to note that Dullcote should be the last step in your painting process, coming after priming and painting your model.
When using Dullcote, ensure that your work area is well-ventilated and protected from overspray. Carefully read and follow the instructions on the product, and always practise good safety habits when working with any chemicals.
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Frequently asked questions
You will need the following supplies:
- A gray primer
- Chalkboard paint
- Silver acrylic paint
- A foam brush
- A rag
- Reactive metal paint or rust-coloured powder
- Paintbrushes
- Dish soap
- Isopropyl alcohol
- Paper towels
First, apply a coat of gray primer to the plastic surface. Once the primer is dry, use a foam brush to apply a thin coat of chalkboard paint. Immediately wipe off the excess paint with a rag. Next, dry brush silver paint onto the surface to give it a metallic sheen. Finally, apply the rust effect using reactive metal paint or rust-coloured powder. You can also create a more textured look by sprinkling coffee grounds or cinnamon onto the paint while it is still wet.
To create a more realistic, distressed look, use the "'dry-brush' technique. Dip the very tip of a flat brush into your paint, then dab the excess onto a paper plate until the paint is dry enough to create subtle brush strokes. Apply the paint to the edges and prominent features of the object, as these areas would see the most wear and tear. You can also use a black wash (a mixture of black paint and water) to create a deeper, more pronounced look.
