Best Paint Brush For Metal

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  • 3/16 to 1/4-inch thickness is perfect for smooth surface roller covers for painting metal doors, interior doors, trim and cabinets. They work well with semi-gloss or gloss coatings and both oil- and water-base enamels. 3/8 to 1/2-inch thickness is preferable for semi.

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Your home’s front door is the first thing people notice. If you want to make a good impression, a nicely painted steel door can significantly affect the look and feel of your house. You don’t even have to hire a professional painter to do it because you can its simple, easy, and you can do it by yourself.

Have you ever experienced painting a steel door only to end up with a trail of ugly brush marks? Many DIY painters especially beginners go through the exact same problem including me. However, do not fret because there are actually simple and easy ways on how to paint a metal door without brush marks.

In this post, we’ll talk about ways and provide tips on how to avoid this. You can still salvage that rusty and withered steel door that you’ve been dying to makeover. All you need is a proper set of tools and the right mindset.

Here’s what you’ll need:

  • Paint
  • 220 grit sandpaper
  • Sander
  • Screwdriver
  • Paintbrush
  • Painter’s tape
  • Tray
  • Solvent
  • Foam roller
  • Sponge or cloth
  • Stir stick
  • Caulk
  • Hammer

A metal door should be handled with extra care especially since the paint that goes over the surface isn’t easily absorbed by the steel.

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Once you’ve gathered all your tools and materials, just simply follow this step-by-step guide on how to successfully paint your exterior door without leaving any streak marks.

Step-by-Step Instructions:


1. Detach the door from its hinges.

Use a flathead screwdriver and insert it between the hinge and the hinge pin. Make sure that it is angled upward in 45 degrees.

Then gently hammer the end of the screwdriver until the hinge pin comes out and remove it. Repeat this process on the other hinge. Don’t forget to ask someone to support and hold the door while you remove it from the hinges.

Once you detach the door, lay it down horizontally. It’s easier to paint rather if the door is flat compared to painting it while it is still attached. This way, you can apply a layer of paint without any runs. In case your paint is too thick, you can level out the brush marks evenly since it is laid flat.

2. Remove the hardware.

The hardware refers to any object that you can dismantle from the door including the handle, hinges, locks, and other pieces. You can use the same screwdriver to detach the hardware. This prevents you from accidentally painting and ruining your beautiful hardware.

Best paint brush for metal

3. Fill in the holes.

Check your door for any signs of cracks and holes. If there are chips and dents on the surface, use a caulk to fill in the spaces.

This will make the surface even so that it’s easier to paint on. Afterward, let it dry for at least 2 hours before you start painting on it.

4. Clean the surface.

Get a rag and soak it in a solvent. An acetone or mineral spirits are good choices.

This will get help rid of any paint residue, oil, and dirt left on the surface of your door. Make sure the surface is dry and let the smell from the solvent disperse before you go to the next step.

5. Sand it.

Sanding is important because it evens out the surface so that your paint can go smoothly. It also eliminates any elements left on your door.

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Use a 220 grit sandpaper and make sure you sand all areas and edges to make sure you won’t miss a spot. After sanding, repeat the process of sanding.

6. Cover and tape other parts of the door.

If there are any hardware left that cannot be dismantled, use a painter’s tape to protect it. Tape all areas that you do not want to paint on.


1. Pick a good quality exterior paint.

Check the label and make sure it is suitable for painting exterior surfaces. An exterior paint is made from materials that can withstand the harsh elements.

A good suggestion is to get an acrylic or latex paint that is water-based because it dries faster. Another option is to use an alky-based oil paint since it provides better protection for your door.

If the existing paint on your door is water-based, you need to use the same type of paint. However, if it is oil-based, you can use either an oil or water-based paint.

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2. Prime it properly.

Applying a layer of primer allows your paint to achieve better coverage. A primer blocks stains and absorbs your paint better. This will make your paint glide over smoothly and evenly.

Make sure you apply the primer properly because it is one of the reasons why you get brush marks. Once you apply the primer, it dries quickly and sometimes before you even out the thick material. One tip is to add just enough water to thin the primer.Another good advice is to apply the first coating of your primer lightly. Use a sanding sponge over it then apply another coating. You can repeat this process up to three times.

Afterward, use a sander to smoothen the surface. This will even out the door and prepare you for the next step.

3. Paint your door.

Use a painter stick to stir your paint and then pour it into the tray. Use a paint brush to cover the trims and panels.

Then use a foam roller to paint over the rest of the door. Let it dry first before you flip it over.

4. Do the finishing touches.

Peel off the tape. Remove the tape while the paint is still wet. Otherwise, once the paint dries up, you may have a harder time peeling off the tape.

Make sure the paint is fully dry before you install it on the hinges. Re-install all the hardware before you mount your door. Lastly, re-attach your door to the hinges.

Say Goodbye to Streaks and Brush Marks

Just follow these steps accordingly. This simple and easy guide will help you finally get rid of those brush marks that are such an eye sore. All you need is practice and eventually you’ll get the hang of it.

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If you enjoyed this article, please share it with your friends especially those who are looking for ways to improve their painting skills. Should you have any suggestions or comments, drop us a message and we’d be delighted to hear from you.

A fresh coat of paint can do wonders to revitalize and protect your household metals. You'll just need a few tools and as always in DIY painting projects, a focus on prep work.


A fresh coat of paint can brighten the look and prolong the life of metal surfaces in and around your home. Painting metal is no more or less difficult than painting other surfaces. And, as with other paint jobs, whether you’re painting a vintage desk or an aging fence in the yard, your success will largely depend on how much effort you put into the prep work. Sorry, no shortcuts. But here’s the good news: Follow the steps below, and the paint job can be expected to last and look great for years.

Step 1

Start by inspecting the metal surface you intend to paint. Assuming that it’s portable, move the item to a well-ventilated space where you have prepared a drop cloth-covered work area. Inspect the metal for cracks and peeling or chipped paint. You will probably find no shortage of surface imperfections, but don’t worry—these can be removed by means of a wire brush (if the rust doesn’t budge, consult these instructions). To be on the safe side, wear a dust mask as you work.


Step 2

Having removed all rust and old paint—or as much as it was humanly possible to remove—proceed to sanding the metal. Use either a sanding block or a square of fine-grit sandpaper. (Here, too, it’s wise to wear not only a dust mask, but also protective glasses.) After sanding the metal, wipe it down with a moistened cotton cloth, using it to clean all the sanding dust off the surface. Before continuing onto the next step, wait for the metal to dry out completely.

Step 3

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Apply a specially formulated metal primer (view example on Amazon). If the object you are painting doesn’t have a smooth surface—if it features lots of nooks, crannies, and crevices—opt for spray primer. Otherwise, use a brush or roller to apply traditional primer, choosing one or the other tool based on the surface area. Check the instructions on the product you’ve chosen, but generally speaking, primer needs about 24 hours to dry.

Step 4

Best Paint Brush For Metal

Rustoleum Brush On Metal Paint

Now it’s finally time for paint. Use a brush or roller, or use a spray paint formulated for application on metal (manufacturers like Rust-Oleum and Krylon offer “all surface” spray paint in numerous colors and sheens). Apply several light coats, letting the paint dry for a few hours between coats. Once you are happy with the coverage, let the paint dry for about eight hours (or overnight). After that, you’re basically all done!

Step 5

Last but not least is the optional step of finishing the paint job with a clear spray lacquer sealer (view example on Amazon). In addition to protecting your paint job, such sealers impart a nice shine.

Now that you know how to paint metal and you’ve witnessed how easy the process can be, you may find yourself studying your home and garden with renewed attention, looking for other things to revitalize with a fresh coat of color. Yes, one successful DIY project inevitably leads to another!