Why do that?
Go to a stand alone paint store to get the correct paint and procedureBut that defeats the purpose of vinyl siding. It will chip and peel and become high maintenance.
Instead of painting it you might consider cleaning it. If you have a single stored home you can scrub it by hand. You can also try a narrow spray from the hose. You can buy a pressure sprayer for $150-200 or you can rent one.
Hi Linda, there are lots of posts on painting siding here: