i dont like rasing QTs in full ring against one limper.

this flop hit him as you said so wait for the turn to raise a safe card, or call down when the scare cards fall.

when you are heads up, its ok to call down. you dont need to protect your hand as if it was multiway. let him bet when he has 4 outs. like i said raise the exoensive street to punish him when the safe card falls.