I have a roof rack on top of my 89 Civic Wagon that I want to remove. It has 2 mounting rails, one on each side of the roof. Each side has 3 big (#3 or #4) Phillips head screws holding the rail to the roof. They seem very hard but look aluminum in color. I have been able to loosen 5 of the 6 screws, but the last one won't budge. I have sprayed a lot of thread loosener on it with no results. I was thinking, since the stuck screw is in the middle position of the rail, if I removed the 2 end screws, I wonder if I could turn the whole rail assembly counter-clockwise, and sort of unscrew it like that, sort of like a propeller? Does this sound feasible? Does anybody have any suggestions? (I don't care if I do a little damage to the roof, the car isn't worth anything to speak of it, I can't hurt its value. But I don't want to damage the rack).