I usually just do interior painting but have been asked to paint a porch. What needs painting is the white railings and steps which have a lot of peeling paint. The homeowner claims they had it painted two years ago by a local guy and didn't pay attention to what paint was used but some of it's chipped off to just bare wood. I'd like to do this as I've done some of their interior painting recently and they want more of their interior work in the future. I don't have a lot of experience with outdoor paint and my SW guy is always trying to get me to spend more on interior paint than I feel is necessary so I don't want to just take his word for it. Any suggestions would be appreciated.