Re-applying wax wouldn't be an issue as this car has likely not been waxed since it got here in 2011... I'm having to use compound AND a polish before I put wax on it just to try and get the scratches and dullness out of it. So far it seems to be working but doing this by hand sucks on this much sheet metal, lol. Really need to get myself a DA buffer. My arms/hands are getting too old for this ****.