Just a quick word of caution: Mouse and other critter feces can be a source for a number of bacterial and viral diseases, so take care in cleaning up. Wear a respirator to avoid inhaling any airborne dust. Try to sweep up the big parts (?!!?) and avoid vacuuming them or blowing them around the shop. Ideally, you can treat the area with a bleach solution (1 part bleach in 9 parts water) for 10 minutes to kill any microbes. This will rust bare metal, but you know it ain't dangerous/biohazardous any more.
There's lots of good info out there, including some on
Hanta Virus
