I have a 2001 Eagle and I managed to punch a small hole in the rear siding. It looks like it may have been hit with a baseball or I backed into a tree limb or something. We just discovered it after getting home. It's big enough that I can push on it with light pressure and see the foam backing. Is this something I can repair on my own? I'm not looking for cosmetic perfection, I simply don't want it to take on water. I'm assuming the flexible siding is fiberglass, but I'm not sure. If so, can I simply use a fiberglass patch to repair it? Will caulk work instead? Any recommendations would be appreciated. Thanks.