Hand 1: call of 3bet is fine. Shove flop -- there is already $900 in there. I guess you can call and call/shove any turn. I probably just gii, though.
Hand 2: I shove here. The guy has only 100bb. He probably has a J, but I'm willing to gamble. If I weren't, I wouldn't have bet the flop
(Basically, check flop and bink turn.) You can fold here -- you are way behind.