Stripper overspray etc.

I need to remove some Arbor coat semi-transparent stain and top coat. the deck is on a second floor. Even if I use a pump sprayer and stripper I'm afraid of getting overspray on a Trex deck, windows and untreated pine siding which are all below. Also will I need to scrub brush or sand the deck after I have applied the stripper. I realize that I will have to apply a brightener to the deck. What will neutralize the overspray that lands on the Trex, windows and siding below?

Finally I'm looking for a solid stain that can be reapplied without a lot of fuss. does such a thing exist?