You can get any paint to look good...Prep and finish work will determine how good...And if the vehicle is never outside it'll last longer...But there's a reason the cheaper paint is cheaper...
We've shot omni on quite a few vehicles but not on restos worthy of a full teardown...Any good resto shop will never point the customer in the cheaper line's direction...It chips very easily and simply won't stand the test of time exposed to the elements and "normal use"... Not to mention the already stated differences...