Paint & Body Work - foam bumper support ?

ok i have about an inch and a half hole right in the middle of my front bumper right where the license plate cover would go it went through it and went into the foam and damaged some of it, its not completely destroyed or heavily damaged, can i just fill the hole in the foam support and call it a day? ill post a pic when i get home of the size of the hole.

my foam support has a nice big crack going down about half of it. By crack, I mean its almost broken all the way through.. Never have had a problem with it.