You can get fiber-glass out of your hand by running a warm water bath. You should then add a generous amount of Epsom salt in the water. Soak in the bath for 20 to 30 minutes and then rinse under a warm shower. This should remove any lose fiberglass splinters as well as help with the itching. You can get more details from http://www.ehow.com/how_5683337_remove-fiberglass-hands-fingers.html.