Ok, so i pulled out and looked at some old military surplus ammo that i have been storing for the past 10 years. About 1 in 4 cartridges has what appears to be corrosion? Light green stuff on the casings....perhaps 5-10% coverage on the ones that have it...is that the lead? I separated these from the ones that still appear ok. Are these now unsafe to use? Should i look into disposal? And if I do need to get rid of it... where does one dispose of old ammo like this?