After--we did this project about a year and a half ago. The Behr DECK OVER product is holding up well. The only place it chipped off was the edge of a step because people have worn it off. I think this would happen with any paint product.
We wound up using Behr solid stain in Slate. We chose it because of its scores on a Consumer Reports test and we generally have had good results from Behr products. Our deck "after" painting. We liked the effect of the old Behr semi-transparent Redwood color showing through, so we left it.
Deck Restoration with Behr's DeckOver - The Home Depot
Revive your deck just in time for warm weather with help from our simple step-by-step DIY tutorial. Find out how to use BEHR All-in-One Wood Cleaner and DeckOver® in Dark Walnut to bring new life to your old wood or concrete surfaces. You can also use the BEHR paint calculator tool to determine the exact amount of paint needed for the project. Click through for the how-to on The Home Depot Blog.