Not to Hi Jack the thread. But to the concerns of heat and finishes. Sawdust is no concern I have a 3 burner propane heater that mounts to the top of a 5 gal tank. 1 or 2 burners keep my 3 car garage/shop toasty. I never use finishes when the heat is on. Still have concerns about leakage of finishes vapor or leakage of propane from tank or burner. I usually raise GD a few inches and never leave heat on when I am not in shop. any thoughts ? Great question OP