Praying. We are on solid praying ground here because it is the will of God that man know Him.
Maybe you did not quite mean what you wrote. [u]Good for Keith for not surrendering to one he does not yet know/has not met[/u].
First you know Him. There is an order in Phi. 3:10. Concern about prayers being answered evaporates. PS forget about prayer that relates to God as an errand-boy. That God does not exist. The point of the written down Bible is that man should know God. That’s also a really big point of the Word of God being made flesh. Reading and hearing is for knowing Him. He reveals himself exactly as needed to each person. Repentance and surrender follow continuously as we know Him "more".
If the prayer fear is that God will not answer his prayer to be saved. That is healthy. In revival people cry, “Is there mercy for me?” The answer is yes but still they cry. Listen to eyewitness accounts of this on this site. The fact that he cares and fears, that is very hopeful. He must know something of God. Check out if what he “knows” of God is Truth or a lie.
But maybe you did not quite mean what you wrote. Just some thoughts. The accounts of revival can teach us. God cuts to the heart of it. Sticking points are revealed and delt with.
Please forgive my quick speaking which can lead to poor communication of truth and misunderstanding. Prayer is what you asked for and that is enough.