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Painting metal is similar to painting any material. The main difference is how you prepare the surface before painting. After cleaning, sanding and priming, you can paint the aluminum surface just like plastic or wood. The whole process is quite simple but time consuming as you have to wait for each coat (primer, top coat, and waterproofing) to dry and cure time. However, the results are worth the effort!
Steps
Project preparation
Skip this step if you want to remove old paint . The chemicals used in this process will help clean the aluminum.
- Use the “after cleaning solution” to remove the paint remover. You can find this solution near the paint remover location in the hardware store.
- Rinse the surface with clean water, then dry with a clean cloth.
- Alternatively, you can use a product specifically designed to remove rust; Buy this product at a convenience store.
- Do not leave any rust spots as it will prevent the paint from sticking to the surface.
- Not all dust masks are created equal. When buying a mask, you should buy one used to prevent grinding dust.
- You can use a higher 400-grit sandpaper on the second sanding.
- If 80- or 100-grit sandpaper produces deep scratches, use 200- and 300-grit sandpaper before switching to 400-grit.
- Grinding the metal surface will help the primer stick more firmly.
- This is very important, otherwise abrasive dust will create defects in the paintwork.
- Or you can clean the metal with a dedicated duster. [7] X Research Sources
Primer for the surface
Plan ahead by reading the label on the can for ideal paint conditions. Most paint brands will indicate the ideal working environment temperature range .
- You will remove the masking tape and sheeting once the paint and/or waterproof coating has dried.
- Working outdoors is best, otherwise you should choose a large, well-ventilated room with an open window. Gas masks are indispensable.
- Do not paint if it is raining or wet, as it will affect the curing process.
- If the manufacturer has different paint instructions, you should follow them.
- If you’re working with a multi-faceted object, let the first side dry before painting the other faces.
- The time it takes for the primer to dry depends on the brand of paint you’re using. Usually you will have to wait 5 to 15 minutes.
- Please be patient and wait for the curing time to expire. If you don’t wait enough time, the paint and primer may peel off.
- Carefully check the instructions on the can for specific curing times.
- Remember to apply a thin coat of primer. A thin spray will help the paint to cure properly. If you apply a thick layer, the primer may become slimy or peel off.
- Then, remember to wipe the surface with a dedicated dust cloth.
- Double-check the tape after this step. If the edge of the tape is frayed, peel it off and apply new tape.
Paint
- Since you’ve primed it, any paint can be used. The paint cans do not have to be written “for metal”.
- If the object you are painting is to be used outdoors, choose paint that says “exterior” or “outdoor”.
- Spray paint is the easiest to use, but you can use brush paint.
- If you’re using paint, use a wide, flat brush made of synthetic fibers. Avoid using brushes made from camel or wild boar hair.
- If you are using spray paint, shake the can for about 1 minute, then hold it 20cm away from the surface while spraying.
- For a multi-faceted object, start painting on the top and sides. After the paint dries, continue painting the bottom.
- Read the instructions on the paint can carefully to see how long to wait between coats.
- You don’t need to wait for curing time between coats.
- Usually you will need at least 2 coats of paint.
- Just because the paint feels dry to the touch doesn’t mean it’s dry underneath. After the curing period, you can be sure that the paint is completely dry.
- If you want the unpainted metal part to have the same finish as the painted part, remove the tape now.
- Spraying enamel paint is similar to applying primer or main paint.
- If using paint, you should choose a brush with bristles made of synthetic resin, and sweep in straight, overlapping strips.
- Enamel paints come in a variety of finishes: matte, smooth, and glossy. Choose a paint you like, but remember that gloss will reveal imperfections.
- Do not use the metal object before the enamel paint has cured, or the paint will become slimy.
Advice
- Paint finish is not as important as primer. That’s because the paint finish sticks to the primer, not the metal surface.
- If there is a place you don’t want to paint, use masking tape on it before applying primer. Peel off the tape after the paint dries.
- If the paint peels off after you’ve removed the tape, use leftover paint and a small paintbrush to cover it up. Don’t forget to apply waterproof paint afterwards.
Things you need
- Water
- Degreaser or dish soap
- Iron brush (rub rust)
- Paint remover and after-wash solution (to remove old paint)
- 80- and 400-grit . sandpaper
- Specialized dusty wipes
- Old rags
- Goggles
- Glove
- Dust mask
- Gas masks
- Self-engraving primer
- spray paint
- Transparent enamel paint
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 9,932 times.
Painting metal is similar to painting any material. The main difference is how you prepare the surface before painting. After cleaning, sanding and priming, you can paint the aluminum surface just like plastic or wood. The whole process is quite simple but time consuming as you have to wait for each layer (primer, top coat, and waterproofing) to dry and cure time. However, the results are worth the effort!
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