If you want to corner weight the car and figure out weight distribution, cross weights, etc, you'll need 4 scales. One for each corner.

The shock towers and shock caps are anodized. You cannot remove the anodization like you would remove paint. Oven cleaner is pretty good at removing anodization, but you have to time it carefully as it'll eat the aluminum a bit if left on too long. There are plenty of articles online about removing anodization. I really doubt their hard anodized, so no worries there.