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When I was in Basic at Fort Benning. (1987) I would have to carry around a Bic disposable and dry shave around lunch time. If I did not do that. Then my drill Sgt's would accuse me of skipping...

Sounds like your second attempt will be much more successful than the first.
The mouth and chin area were also the toughest for me. My chin hair is very coarse. I think most beards are in that area....