However you may find this too time consuming so cleaning with a pressure washer will likely work well enough to get ready to paint.
How to paint alum siding.
The key to painting aluminum siding is preparation and priming.
The key to painting aluminum siding is to get it really clean and to use 100 percent acrylic latex paint.
Apply the primer as you would on any surface using a paintbrush or a roller.
Thoroughly clean the siding and allow it to.
Once everything is clean and dry you re ready to apply your primer.
Wield your paint roller from left to right if the siding is horizontal or up and down if the siding is vertically oriented.
Expect to pay the premium for good paint.
If you need to paint aluminum siding choose a day when the weather is at least 50 f 10 c and dry since moisture from rain or dew will ruin a new paint job.
This is very important to allow the paint to reach its maximum adhesion.
Test the adhesion by scraping it with a fingernail sanding it or pulling masking tape off it in a quick motion.
Doing this will ensure for an even and complete coat to been applied.
Then roll along the panel of siding quickly but with even pressure to be followed by moving backward in the opposite direction.
Apply one coat of acrylic primer.
Start painting at the top and work your way down.
Check the label to be sure it s recommended for metal siding.
All of the chalkiness must be washed and scrubbed off and any flaking paint removed.
The best way to get this siding clean is to power wash it.
As you go smooth.
Since the oil paint does not cause a reaction with the siding this paint will act as a barrier between the aluminum and the acrylic finish paint.
You may want to tint the primer with a lighter hue of the finish color for easier color application.
Allow the paint to dry several days.
Coat your roller in primer and roll quickly and evenly along the panel of siding then roll backward in the opposite direction.
Using the finish paint of choice paint a small area of the siding.
Using fine steel wool smooth out any rough areas due to peeling on your aluminum siding.
Paint aluminum siding with acrylic.
After your siding dries.
Use it on the siding and you may find that using this sands down to the bare metal which would be the ultimate prep job.
Putting drop cloths over the landscaping near the house keeps the primer and paint from dripping onto your plants.
Add one pint of paint thinner to the gallon of oil based metal primer paint.
Brush away dust and dirt from the siding as they accumulate.
Then follow up by two coats of acrylic topcoat paint.
Have you ever wondered if you can paint aluminum siding.
Choose a primer made for metal for the best results.
Or you could wash it by hand with tsp or a similar product available at home centers and paint stores and rinse it thoroughly.