The only problem would be removal if applier too thick.
SG is best used with thin applications.
If you get to the point that it is being a PITA to remove, a good QD will help the process of removal, however, it is best to wait 24 hours before wetting the car after application with anything, whether water, QD or driving in the rain. SG is best when allowed to "cure" a min. of 24 hours.