Oh David!!!

My heart bleeds for you!

I don't mean to be cruel, but for the sake of many others here I have to say this:

This is NOT a good second airplane!

Now EVERYONE out there, READ MY LIPS...

"THIS IS EXACTLY WHY NO PLANE WITH A BOLTED-ON WING IS A GOOD SECOND PLANE!!!!!!"

Ok, now that I'm down off my soapbox...

Sheldon is correct, follow the proceedures he mentioned. The only thing I might add is after you back-up any holes, you may want to add a piece of balsa to fill the area (if it is a large area) and THEN fill it with filler (just so you don't have a big chunk of filler which could crack over time)

Good luck, and keep us posted.