Has anyone had any luck getting a person-to-person auto loan from Capitol One with poor/bad credit?

I have heard that Capitol One approves auto loans for people with poor credit for purchases from a private seller. But I don't want to apply and get denied, which will damage my credit even further. Can anyone give me any ideas about this or know of any companies that are guaranteed to give bad credit auto loans to people who want to purchase from a private seller, not a dealer?