My husband and I are going to be in the market for a new car soon. His score is in the low 700s and mine is in the low 600s. Would applying together pull down the "good" from his record, or should he apply solo?
if you are married I would suggest just applying for a joint application. Depending on the bank they will base the rate off of his score so that way you can build your credit without having to pay a high rate. This isn't always necessarily true though, banks like Ally, Well's Fargo, etc, have internal scoring systems that judge the risk based off of both applicant's to determine interest rates which could possibly result in a higher rate than what he could get on his own. A credit union would be a great place to start for financing.
I would suggest a joint application as it will help your scores in the long run. Having one person with 700 and one with 600 won't hurt your chances of a good APR. I always suggest Penfed, great rates, super easy and shopping with that preapproval is so much easier than the finance run around at the dealer and their marking up interest rates.