Didn't even Dell sell servers with a small amount of explosives so that the disk and memory go boom on unauthorized open? (amount comparable to the amount in in airbag -- yes, your airbag has explosives) At least one of the brand names did, as I recall.
Couldn't you just turn the circuit upside down and use a diamond tip drill (Dremel would do) to drain the acid?
I think sticking with full disk encryption would be a more reliable choice.