Hello, I have the idea of removing 3 outdated porch rails which are the support to my front porch roof. These rails are metal and are not rusty or loose as I paint them every spring but I would like something more modern like wooden posts with some trim. My porch floor is concrete. What type of wooden post should I use that would not rot so fast and that I can paint? I would like the posts to be at least 6x6. I am planning on sitting these post on cast aluminum plates to prevent some rot at the bottom.