You can, but the results won’t be quite as good. The synthetic wax will definitely last longer. I would do a double coat the first time if you aren’t going to do the rest.
Thanks, Dave, I was hoping with your detailing background you would chime in. I kinda thought when somebody suggested carnauba, that it wasn't the best stuff for a car out in the weather. I might just bite the bullet and do the job right. We'll see.