BK,
I have the same type of blaster. I used it to strip all of the body panels on my 1953 MG. There are several things to consider before doing this. As mentioned, a big compressor is a must (at least 220Volt, 5+HP, 50+ gallon tank). You will need a very high volume of air from a pump that is rated for continuous duty. You will need lots of blasting media. I used play sand, which is a big NO NO unless you have a fresh air supply system - (I did.) I would recommend enough to fill the tank 2-3x. You will need spare nozzles, because the inside of the nozzle will erode during use. You will need some way to contain the media or it will end up in every square inch of your garage. I built a blasting booth/paint booth to work in.
The picture was taken before I mounted box fans and filters to dissipate the dust. Blasting makes tons of dust. At one point during my blasting, the wind pulled the door open on my booth. I was facing the other direction and didn't know it. The dust blowing out of the opening was circulated all over the inside of my garage. It got on everything! I still find it 3-4 years later.
You will need to stop and refill the media each time the tank empties. I used a broom, shovel and dust pan to scoop up the media from the floor and pour it back in the tank. You will need a blasting hood, respirator (or better yet a fresh air system/mask) and heavy clothing for your protection. Inhaling dust from blasting with sand will cause silicosis - very bad! You will get basting media everywhere (like in your ears!).
For the exterior, you will need to work with lower pressures and be care not to warp your body panels. On my MG the steel is thicker than a Porsche, so it was less of a concern.
Bottom line, the blaster works well, but a pro will save you a lot of trouble.