[Shotimes] Should I Line-X my floor for soundproofing?(Ben Wilmarth)

[BEN WILMARTH]

I currently manage a Line-X dealer in Bellingham, Washington, where Line-X is
mostly used to line truck beds. I've heard that soundproofing your car can be
done with spray on products like this and wanted to know from you guys if I
should take advantage of the cheap price I can have it done for. I would take
out all the interior and spray the whole bottom pan, basically underneath
anything the carpet would cover and the whole trunk covering all the metal
areas, at about an 1/8 to 1/4 inch thick. I think this would surely cut done
road noise and make for a little better sound for my stereo. Please reply back
sharing your own experience with any soundproofing and let me know if this
would be worth doing. I'm also thinking about applying some of that dynomat in
the doors under the panels, completely seal this sedan!
Thank You Ben please reply need to decide soon!