I have been reading some of the threads about how folks prepare their car for the winter. Is there any reason to put on a sealent even though my car will never see the snow, salt, or winter's muck? Now, if you tell me my car will just LOOK better by doing this extra step, i'm all ears! My current routine is Vanilla Moose polish topped with S100. I have read some posts that using EX-P underneath the S100 (it is underneath, right?) will improve things.