Kupper, good for you, for taking this animal back. No lacie should ever fall into the wrong hands, as this one unfortunately did.
Josiah, do you realise what a majestic beast you have in your care? You're very lucky. But you've downgraded the beast to an enclosure that isn't worthy of it. Your enclosure looks like a desert. Young lacies do far better on a substrate of moist mulch/coco-peat, not sand. This certainly would have helped with the shedding.
I'm not sure about your heating, and I see no body blisters in the photo's you have provided. I use 100 watt reflector globes and allow my animals to get closer to them (the globe being 15-20cm above them), and have yet to see a burn or any other skin problem on any young lacies that I have raised. You may even want to put a heat mat under the tank so the monitor can always have a warm surface to lay on.
It's a shame that you may give up on a very rewarding species, but it's probably for the best.