filling panel beater bag

I read somewhere that sand isn't the best to fill a bag with, so what are some common things used?? thanks.

I read somewhere that sand isn't the best to fill a bag with, so what are some common things used?? thanks.

I'm going to show my ignorance and ask... What is a panel beater bag?:sly:

lol, i might not even have the right name, but ether way, i went with a #9 bird shot, seems to work well.

http://www.fournierenterprises.com/lsb08.html
http://www.irvansmith.com/scart/panel-beater-p-1041.html