Mouse House

[Gyawo]

I recently bought a 1986 K5 and it is turning out to be a mouse house. I am kind of ok with it, just means I have to rip everything apart to clean it(would rather not be rollin' around in mouse ****, ick). With ripping everything out(seats, dash, trim panels, carpet) I was wondering if anyone knew a product that I can use to spray the floor instead of putting new carpet in. It has to be sound dampening and hopefully a little insulating. I would ideally lay that stuff down and then put a coat of bedliner or something on top of that.

Also, my power rear window will not go down. The motor works, I take the cable off the regulator side and it does turn, but it will not bring the window down. I can't open the tailgate due to the window being up, so kind of a pain in the ass. Any tips/suggestions?

Thanks,
Grant