[Geronimo '74]

In another thread I saw a pic of a set of bottles (3). It was a "tap out kit"
One bottle contained a liquid with nitric acid.
the idea is to make some sort of dam (with clay?) around a snapped of stud and fill it with the acid.
It is supposed to disolve the metal stud and leave the aluminum of the head intact.
The other bottles contain a neutralizing liquid.

I bought a bottle of nitric acid today, tech grade, 61.4% (40°).
Maybe it's worth trying to remove a stud this way before I have to drill it out and risk damaging the head.


Does anyone of you know:
Is this concentrated enough to disolve a metal stud? (I'm guessing it is)
How long would you estimate it would take to disolve the stud enough to remove it??

Weird question I know...