RV Repair: Water Damage Repair, water damage repair, staple gun

Question
We had a large hole punched in the side of a 24 ft travel trailer above the rear storage door which subsequently caused rot in that whole area & around the water heater in back. We want to repair it ourselves, but would like to know how to properly resecure the skin when the work is complete. Any info is greatly apprecieated.

Answer
THATS A HARD ONE TO ANSWER IN TEXT.
WHAT IS THE SKIN MADE OF.
IF IT'S ALUM, THEN IT'S A TYPE OF TONGUE AND GROVE CALLED A PITTSBURG EDGE. WITH THE TOP PIECE BEING THE FIRST TO GO ON, AND THE BOTTOM PIECE THE LAST AND THE REVERSE TO TAKE OFF. ONE NEEDS AN AIR TYPE STAPLE GUN WITH A 3/8 WIDE CROWN AND 1/2 LONG STAPLES OR EQUIVALENT TO REATTACH THE SKIN IN ORDER TO HAVE A SECURE REATTACH.
IF IT'S FIBERGLASS ,YOU'LL NEED A GOOD WATER BASED ADHESIVE AND A GOOD CLEAN SURFACE TO BOND TO , WHICH WILL BE HAD TO DO UNLESS YOU CAN CLEAN THE SIDEWALL COMPLETELY.

THOM