oh i just wanted to add, don't worry about being neat with that glue on the foam. slop and spread that stuff pretty quickly, get that canvas down and start your stretching. i don't think you want to do it in stages, you want to whole thing tight.
wear despoable clothes, this glue does not wash out of clothing. wear a hat to help protect your hair.
this stuff is faily thick, i just got a better feel using my hand and could work it better. but a putty knife works also.