Yes if they are partner. Check the guidelines of your air miles to see if they are transferable or able to do so.
Large caliber weaponry may work. ;-)What makes you think that an airline is going to allow you to use their incentives for some other (completely unrelated) company's benefit? And what makes you think that a car rental company will accept airline incentives?Hey look, I have a coupon for a free pizza. Please give me one. I can wait while you drive to the store. ;-)