I am finishing the recording of a song which starts out with gentle piano, builds up to a fairly "loud" bridge with several more instruments, then gradually goes back to the same arrangement as the intro.
Today I was listening to it in my car, and I noticed that the intro and outro are almost inaudible when there is any kind of background noise. This made me wonder: should I compress the song after having finished recording, so that the more quiet parts will gain some volume? With the more "crowded" arrangement in the middle section, I think the song's dynamics would still be quite good despite the lack in evident volume difference.
If this is not the best idea, what would a better solution be? Is there some trick that people use to solve this problem?