Is it necessary to prime aluminum or vinyl siding before painting?

No, as long as the siding has had a chance to weather a year before painting. You do need to clean the surfaces first with an Extra Strength Cleaner Degreaser. You want to be sure the surfaces are free of chalk and residue. ... more

No, as long as the siding has had a chance to weather a year before painting. You do need to clean the surfaces first with a cleaner like ProClean Extra Strength Pre-Paint Cleaner Degreaser. You want to be sure the surfaces are free of chalk and residue. ... more