Aluminum Repair With TIG Question

Hi,
A co-worker asked me if I could fix his "Gold Buddy", Slues box.
Please see the pics.
These are bullet holes, someone pounded out the extrusion. I plan on cleaning as good as I can and placing the sheeting on a thick piece of aluminum to reduce the heat. Do a bit of pre-cleaning with the TIG torch then form a puddle and fill.
Any other procedures or ideas/problems with my plan?
I do have some scrap material that is the same thickness so I can get the settings close before I tackle this simple to you job.
Thanks for the help.

 

Thanks,
The owner pounded the holes closed.When he did that he pounded/folded in the dirt, grime, debris etc.I think it may have been easier if the holes had been left alone.
I have very little experience with aluminum, the contaminants burn off with some wild colors, smoke, etc.
You guys already know this but I am learning a new experience.
Aluminum is tricky.

I was about to mention that. Also some aluminum prep or a light acid solution to clean material does wonders. I had the opportunity to work in an all aluminum tig shop for 3+years. The other thing is you can use wood to create "throw away" fixtures for fabricating with aluminum. Wish i got to do more of that type of work.