@leo,
Showering is not a term used in automotive paint practices. Please find a description of the practice you're mentioning anywhere online; or reference to it as a "good thing" done frequently and I'll eat my hat.
Secondly-- what you're saying would result in a crap paint job which would wear off in a month. Giving it a fresh look? Please thats' a joke; it would look horrid. Any professional painter who knows what he is doing will sand down the paint first. Heck even a monkey pretending to be a painter would do the same.
"Showering" it like you've mentioned would not allow the paint to bond well to the surface because of the clear coating. Please go research this and automotive paint properly. The paint would FLAKE off very soon.
What you're saying could probably be practiced here; as its Pakistan but I'm sure they mean shower in the sense of a repaint.