Rust on Mailbox - Texture + Prisma Postprocessing iOS app

Taken 7/26/2016 when I was walking in the neighborhood and spotted a mailbox with rust & paint on it.  It had just stopped raining and sky was overcast. The surface was damp. This rust had some texture and thought this would be an image   I could play with some filters in postprocessing. Taken with an iPhone 6, shutter speed 1/25th sec @ f22. (This setting is not really good to take a handheld image and the mailbox did curve in the area I was taking as a close up. I did try to keep in the same plane as much as I could). It would have been better to use a tripod.  The left image is the original as taken.   I did edit by increasing the contrast and sharpened to the max before starting to work with image on the right.  I used Prisma app to achiever the saturation in the R image.  If you can expand to see more detail, you will see all different kinds of texture that looks more like an abstract drawing with different colors.  The Prisma app is new for iOS phone and can render different types of artistic effects.  I don't remember the filter chosen as I had experimented a lot until I got the look I wanted.  This image was shown at the TOPS Camera Club on 8/5/206.