Vinegar is acetic acid- - - -the same stuff is available in stronger concentrations on Ebay. Try adding some of the strong stuff to the vinegar instead of playing Russian roulette by mixing different types of acids together.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!