This material is the same mirrored aluminum used for actual reflectors. It comes in 4x12' sheets so it needs to be cut and bent. As Dion said, Bruno asks us to call ahead. I've used it a lot so feel free to call if you want tips on working it.
But if your lights already have reflectors or VHO bulbs with internal reflectors, lining the canopy does little good.
If the lights lack a reflector, lining the canopy works okay, but is less effective than making a properly sized and positioned reflector. 
Edited by Mark Peterson