i am a house painter for over 30 years.
i purchased behr products once and only once. All behr products are
defective and inferior. the paints don't cover. A good paint is thick,
the stick stands up in the can. behr paints are like water. i've heard
their best semi - gloss and high gloss peel like a rubber coating.
their deck stains are also know to peel. do yourself a favor stick with
brand names like benj moore products. you will never have a problem.
stick with thompsons deck stain you will never have a problem. As for
your specific problem i think you must strip or sand off the stain
depending on the square footage. then re-stain. if you need specific
advice e-mail me directly. need to know what type of wood and square
footage deck and type of railings.