Use the handyman's secret weapon..... Duct Tape!</p>

Just kidding, i use masking tape, and lots of it. It usually comes off, but sometimes there are little bits stuck to the glue itself.  U can try packing tape, the glue might not stick to it.  On a build posted on youtube (BIGWINGS) a guy uses epoxy and gorrila glue.  He uses 5min to tack the foam together, and it sets up and holds the foam in place before the gorrila glue sets up.</p>