I wouldn't as apple doesn't recommend this
http://support.apple.com/kb/HT3226#ipads
Even on the non-screen parts? That only recommends you don't put it on screen parts.
A slightly dampened micro-fibre coth is all I have ever used on my Ipad's, iphones and my Macs. No chemicals of any kind. This is even more important with touchscreen products as they have an oleophobic coating. Using chemical compounds can remove this, causing damage. There is no need to clean the alloy back with anything else either.
But can the alloy back be damaged by such fluids do you think even though many of these fluids say they can be used on iPads.
Even on the non-screen parts? That only recommends you don't put it on screen parts.