k-frame strengthening

Ok, I'm getting ready to take my k-frame, the one with the sway bar mount pre-drilled, to my local powder coater. I've seen people mention welding up the k-frame to strengthen it, and it has to be done before getting powder coated, so I was wondering, what all should I hit with the mig to strengthen it??????

Anyone have some pics of what and where?

Thanks in advance

FF