Rosebud tips are generally used for heating larger areas/pieces, like the knuckle before dropping in your new chilled bearing.
Use a smaller cutting torch tip and keep the flame short. Soak some shop rags in water and drape them over things you don't want to catch fire, like cv boots.
Find some table top heat pads like for serving dishes or pots at bargain stores for heat shields while heating with the torch. Drill small holes for bailing wire hangers.