Plywood has the glue right? Where regular "sparks" will come out of the chimney and be gone within a few inches of exiting. Plywood "sparks" will fly out, float around in the air, and still be burning as they settle on the ground. If you have a baffle you'd probably be okay.
"There are no finger prints under water."
The Great Kazoo's Feedback
"when you're happy you enjoy the melody but, when you're broken you understand the lyrics".