fighting a light 4-bettor.

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This is a cash game question, but I think that SnG players will probably give better answers. Keep in mind the stack sizes, but also this villain's tendencies.

I ran into a light four bettor for one of the first times today, or at least he was the most diligent of the ones I have encountered. He was playing a fairly LAG game already, with stats settling at about 30/19 over the first 100 hands. (He started even looser, but settled down quickly.) He was also very aggressive postflop, with an AF of 15.

The first time he 4-bet was against my first 3-bet at the table, so I quietly laid down, and a couple orbits later I 3-bet with KQo and didn't have the balls to stand up to him gambler2k4 style. At this point I made a plan to get it in with him next time he tried that, but I didn't get a chance before this hand. Villain is on the Button, and so far any time he 4-bets light he has been in position. (I am sitting out, but would be between SB and BB).

No Limit Holdem Ring game
Blinds: $3/$6
4 players
Converter

Stack sizes:
UTG: $598
Button: $690.25
SB: $594
BB: $736.10

Pre-flop: (4 players)
UTG folds, <font color="#cc0000">Button raises to $18</font>, SB folds, <font color="#cc0000">BB raises to $30</font>, <font color="#cc0000">Button raises to $90</font>, BB calls.

Flop: 8[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] ($183, 2 players)
BB checks, <font color="#cc0000">Button bets $150</font>, <font color="#cc0000">BB raises all-in $646.1</font>, <font color="#cc0000">Button calls all-in $450.25</font>.
Uncalled bets: $45.85 returned to BB.

Turn: 9[img]/images/graemlins/club.gif[/img] ($1383.5, 0 player + 2 all-in - Main pot: $1383.5)


River: 3[img]/images/graemlins/spade.gif[/img] ($1383.5, 0 player + 2 all-in - Main pot: $1383.5)


Results:
Final pot: $1383.5
Results:
Final pot: $1383.5
BB shows QC QS
Button shows 7S 6H


At this point what sort of plan should I take against him?

What hands should I be willing to stack off with?

Should I only 3-bet hands I am willing to get all in preflop with?

Should I be calling his 4-bets wide and looking to see flops, or just pushing and running the cards?

What adaptations do you make to a player that is playing a slightly loose game but fights back against 3-bets?