50 NL Flopped Nuts

[bustacaps18]

Sorry if I'm posting this twice but it looks like it got deleted from the forum. Anyways, no real reads on any of these players. I'm just not sure how to bet the nuts w/o losing your opponent while at the same building the pot. Any advice is appreciated.

$0.50-$0.50 No Limit HE

BB: ($48.95 in chips)
UTG: ($60.35 in chips)
BTN: ($113.85 in chips)
SB (Hero): juboy3 ($76.80 in chips)

Dealt to juboy3: Ac9c

*** Pre-Flop *** :

UTG: Call ($0.50)
BTN: Fold
SB: Call ($0.25)
BB: Check

*** Flop *** : Jc 3c 4c
(Pot: $1.50)

Hero: Check
BB: Check
UTG: Bet ($1.50)
Hero: Call ($1.50)
BB: Fold

*** Turn *** : [ Jc 3c 4c ] 6h
(Pot: $4.50)

Hero: Check
Villain: Bet ($2.50)
Hero: Raise ($8)
Villain: Fold

Should I be leading the flop? Or should I check/raise the flop? Same for turn.

[ajmargarine]

50nl is microstakes. it got moved to that forum, check there.