Glenn Bray stumbled across the work of Polish sculptor Stanisław Szukalski in a Hollywood bookstore 50 years ago. Bray was a comic book collector in his early 20s. A few years later, he learned that Stanisław lived only five miles away from him. They became friends for 15 years -- until Szukalski died in 1987. More than 200 hours of their talks are on tape, and now in the new Netflix documentary “Struggle: The Life and Lost Art of Szukalski.”