1997 Acura RL Grease a 97 Acura Rl

I have a sound coming from the passenger side by the control arm. Everytime i turn the wheel it makes this sound like metal on metal. i have read that it mite be a ball joint or a bushing. People have said that i can grease it with silicone grease. I can buy the grease gun , But my question is where do i start. or how do i do it. never have worked on my acura rl.
Or do you have any idea what it can be???

Thanks for you help,

Ray