This method also works great for painted aluminum siding. The big test is very simple: wipe your hand across the surface and look for a chalky white residue. Coincidentally this is called “chalking.” This is how a paint finish wears out and ages. It’s perfectly normal. You MUST remove all of this chalking! If you don’t, the new paint you put on will come right back off.
After you have removed all of the chalking, you should prime everything with an Acrylic Bonding Primer. Most paint stores carry have one. This primer will “grab on” to the metal better than most other primers. It also gives you an excellent base for your new paint. After you have everything primed, you can apply 1-2 coats of your favorite 100% Acrylic exterior paint.
Here is a picture that was taken shortly after the home was painted. It now has a sound finish that will last for years to come. The front of the house faces South, on a sunny day, the brightness of the white will definitely cause you to shield your eyes!
Be careful not to go too dark on your colors. Sheet metal can expand and contract quite a bit with the temperature. Darker colors absorb more light and may cause more heat, causing more expansion than normal. Paint will stretch, but it has its limits! Stay with lighter colors that reflect more light and will keep everything cooler. Your best bet is to go back with the same color as the original.
Thanks for the question!
If you have a question, or maybe a need for my services, send me an email! Just click the "View My Complete Profile" section to the right and go from there.