This is quite interesting. I always thought isopropanol, denatured alcohol, and 'rubbing' alcohol were all the same thing, only that rubbing alcohol had some water in it. Thats why I steer away from it. Thanks CP140 for the lesson.

I don't use CA on firewalls because I think it will eventually break down with constant exposure to fuel. Correct me if I'm wrong on this- it's what I was told.