I am applying for a PhD at a new university. But my grade is a little off to the scholarship line. The student service told me that I may get a scholarship, but not for sure. Now I have found two potential supervisors now. I have been working with one for years but he doesn't have much power in the university. However, another one, who he is working for and will be my main supervisor, weight a lot in the faculty. I am not familiar with the latter. Just met him once through the Skype interview. Is it polite that I ask for their help? How should I ask for the help? I am in Australia, but an international student.