I not only scrape the loose paint off, but then sand the entire area down, apply wood putty if needed, sand again; before applying anything! Yes, it's a tremendous amount of work for this much of railing; especially for a 74 year old woman! I did not want a natural wood finish, as I wanted it the dark green to match the trim around the windows; so that's why I use paint. I have Trex on the entire deck; so that's not a problem.
Even though I'm a gal, trust me, this is not my first rodeo dealing with painting houses, etc.
I also just finished painting the entire west side of the house. I've been doing the upkeep (painting) of our homes since the mid 60's; as my hubby did not get along with painting!
I simply wondered if anyone had any experience with this new Behr product.