Manual approach call GA, advance T/L's with straight arm - 2 hands onto control column - and call for flap change, call for PM to check thrust, after +ve climb confirmed call for gear up. Hand back on thrust levers when approaching level off.
I've never seen it flown like that, I know of at least one examiner who would fail an engine on you if he saw your hands come off the thrust levers during a go around ( or on approach for that matter). I guess different companies have different 'techniques' regarding where your hands are placed.