adhering mylar to homemade cfl reflector

hi, i've been lurking around this forum for a few weeks now; this is my first post. I just made a cfl reflector out of some thin aluminum sheeting. On the reflective side its flat white but i feel like mylar would be more reflective. Im wondering what would be the best way to get the mylar onto the reflector, i was thinking a spray adhesive you would buy at a crafts store would work or would heat be an issue here? Im planning on using maybe 4-6 42w cfls so it may get kind of warm would the mylar be in any danger of catching fire? What do yall usuaully use to line your box\room i was going to go pick up one of the emergency blankets and cover the light with it.

the project is not quite finished yet i need to go pick up some fixtures and ill post pics in the meantime any help would be appreciated.

Spray glue or double sided tape.

spray adhesive, phil! =)