Wldcat, the only reason they did that with the Me163 was because those 2 very specific chemicals exploded on contact. You didn't hae to ignite them. They were also nasty and harmful.
Like I said, tons of different types of RATO fuels out there. Tons of variations with less caustic results. That means they're safer than a fully fueled Me163, and can be stored.
All hypothetical, naturally. But you shouldn't compare a Me163's methods of fuel storage with those of a RATO unit. They really don't compare.