I am not sure what it is about these but the backs of every single one I can find online has started to go white. It does clean off. I simply haven't done it to these.
Vietnamese Pith Helmet Viet Cong Pith Hat Vietnam War Soldier Tropical
RARE VIET CONG BATTLE FLAG
RARE VIETNAM WAR VIET CONG GURIELLA FIGHTERS SCARF
VIET CONG FIGHTER VIETNAM WAR ERA SCARF
1971 VN WAR MAP USED VIET CONG/NVA FORCES CAM RANH BAY / PHAN RANG
RARE VIET CONG POLE MOUNTED BATTLE FLAG BEAT US AGGRESSORS 1968
