Some paints claim they are fine to use on bare aluminum and may work fine in some applications but if you want the finish to last do the preparation correctly.
Painting aluminum trailer siding.
With that said i have had pretty good success with behr marquee exterior paint and primer in one.
In a nutshell you need to start with a clean palette.
Coat your roller in primer and roll quickly and evenly along the panel of siding then roll backward in the opposite direction.
Painting aluminum siding with painter s tape and lengths of plastic sheeting protect items and areas adjacent to the siding.
Once everything is clean and dry you re ready to apply your primer.
Then wash your rv and let dry.
Check the label to be sure it s recommended for metal siding.
Expect to pay the premium for good paint.
The key to painting aluminum siding is to get it really clean and to use 100 percent acrylic latex paint.
All of the chalkiness must be washed and scrubbed off and any flaking paint removed.
Finally use an aluminum oxide primer before using a good acrylic latex paint.
The best way to get this siding clean is to power wash it.
Painting an aluminum trailer starts with some preparation because aluminum by itself does not allow the paint to adhere very well.
If you are painting straight over an aluminum sided trailer you will want to use a primer that is meant for direct to metal application.
How to paint aluminum rv siding.
It goes on nice and smooth and covers beautifully without the uses of an added primer or extra coats.
You must take a few extra steps if you want the paint to continue to look good down the road.
The key to painting your rv s aluminum siding is to make sure that the paint you use will adhere to aluminum.
After that tape off anything you do not want covered in paint.